01 Honda CRV Performance Upgrades?

I have a 2001 Honda CR-V with the B20Z2 4Cyl. This thing it's a gutless wonder. With that being said, I wanna put more horses under the hood. Any input?

Specs:
Engine: B20Z2 DOHC 2.0L 4Cyl
Trans: Auto (4 speed I think)
Drive: Real Time AWD
Current HP: ~120 +/- 10
HP Goal: 300+ with turbo 200+ naturally aspirated
Prefer naturally aspirated but the wife wants turbo. Either or will do though.

Should I buy a Jeep Grand Cherokee, Honda CRV, Subaru Forester, or Land Rover Discovery?

I'm a little ignorant about cars and I'm getting ready to buy, so some advice would be super helpful.
First of all, I have $3000-4000 to spend. I have been looking at used cars on Craigslist Denver from dealers and owners, and I have narrowed my choices down based on what I want and what seems to be available locally within that price range. I have narrowed it down to:
Jeep Grand Cherokee
Subaru Forester
Honda CRV
Land Rover Discovery

So here is what I'm looking for:
4 wheel drive
Automatic transmission
Not too big, but
Very safe in snow and inclement weather

These all look like great cars, I'm just having trouble deciding what is best. I definitely prefer a 6-cyl, but I was also wondering what the downsides are of a 4-cyl as I'm highly considering a Honda CRV but I think it may be a 4. Would that be a terrible compromise to make? Not looking for any off-roading, long trips, or the like, at least not most of the time. Maybe an occasional road trip. So I may be willing to settle for a 4-cyl unless you can give me a good reason not to.
The ads I've been saying mostly range in year from 1998-2001 for all of these cars.
Please don't suggest any different cars as these are the ones that are available that suit my needs.

Thank you all for your help! Any and all things I should consider when buying these cars is welcome. I'm aware that I need to look out for rust on Jeeps but other than that, I don't know much about any of these cars.

Why does my 1997 crv RPM jumps up and down?

My honda crv's rpm jumps up and down at random times on drive, park, or even when the engine is turned off. At the same time, the car would stall when driving (even at around 60-70+ mph) stepping on the car pedal and revving the car would stabilize the stalling. At low speed, 0-30mph, the car would stall and die. I can't figure out the problem! I bought new spark plugs, new distributor cap and coil (except the distributer itself) what can it be?

Honda CR-V or Toyota RAV4?

Hi, I'm having trouble deciding if I want to buy a Toyota RAV4, or keep my Honda CR-V.

I currently have a 2001 Honda CR-V LX with 142,900 miles on it. I bought it for $4,000 dollars from a private party and I absolutely love it. Maintenance is cheap and easy, and it's a great ride for the area I live in, which has a lot of mountains and such.

I've recently come across a 1998 Toyota RAV4 with 124,000 miles on it listed at $3,900. I've run Blue Book values and they are both worth about the same, with the CR-V being maybe $200 higher.

My main question is, which one is better? Or are they both the same? Should I switch to the Toyota RAV4 or keep my CR-V?

Why is my newly fixed car AC blowing warm?

Recently, I got a Honda CRV 2001. We replaced the compressor, expansion valve, evaporator, and dryer vent. We flushed the lines clean, resealed everything, and charged the AC to spec with 2 cans (24oz) of coolant. But, with all that done, it doesn't blow chilly air, rather cool/warm air that doesn't really get the car cold during the daytime.

Also, we know there isn't a leak, because we vacuumed it out and it held nicely, we even had my uncle's neighbor there who does refrigeration for a living and he said everything was perfect.

Note: I do live in Arizona and the outside temp ranges from 100-115 degrees during the Summer.

Any ideas?

My car is making a knocking noise?

I'm by no means a mechanic or am I really car savy at all so I'm looking some advice on what this could possibly be.

I recently bought a 2005 Honda CRV with 107k miles on it. I noticed recently that when I give the car a lot of gas while at a dead stop I hear a knocking noise that seems to be coming from the front end underneath the car. The knocking stops once I'm done accelerating. The knocking DOES NOT occur when I'm sitting idle or if I rev the engine while in park. If I do not give it a lot of gas while at a dead stop the knocking does not happen. It only occurs when at a dead stop.

Any advice or input on what this could be?