What types of Japanese cars would you recommend?

I'm buying a new car and need help finding the ideal model. I love the style of Japanese cars and am looking for something that fits into the following range of cars:

Honda Prelude
Honda S2000
Mazda RX7
Mazda RX8
Mitsubishi FTO
Mitsubishi Eclipse
Nissan 350Z
Nissan 370Z
Nissan Skyline
Toyota Celica
Toyota MR2
Toyota Supra

Insurance and running costs need to be factored in as I'm young and living in a bad area but I'm just looking for ideas on what car would be suitable. It's time for the Prelude to go. Although I'm thinking about just upgrading to a nicer and tidier Prelude. It's a struggle ti find the perfect model! Any help would be appreciated…

What to use to clean the inside of my engine?

I recently brought a Honda cb550. Prior to buying it I was told there was a head gasket oil leak. Since I have to strip the engine to change the gasket I thought I might as well give it a good clean. As I know the engine hasn't had the oil changed in a long time I know it needs a good old clean inside anyway. So I wanted to know what spray/fluid would I use inside to clean all the components and and walls of the engine? Is there anything I shouldn t use and is there something that works for cleaning all the components and engine parts?

Why are new vehicles few services too early?

I've bought a new 2 wheeler Honda Activa 3g (8'jan'20016). When I saw It's manual book I had come to know that they gave me 4 so called free services and 1st should be done with in 30 days or 7500-1000kms (whichever is earlier). So, problem is that i don't ride much and when I took my scooter to the service center It was only 161kms done on Odo-meter. They charged me 500 /- Rupees only for changing oil and wash I told them about few minor issues but they didn't resolve anything except changing oil and washing. I want to know, why are these new vehicles required early services.

My 2000 Acura/Honda integra gsr is not accelerating correctly?

So it started about a week ago when this problem started. The problem went away for a couple of days and today it came back. At first i though it was the transmission or the clutch slipping. What happened today was that i was at around 6k rpm on vtec and all of the sudden it feels like the car is stopping/slowing down and i'm on full throttle. I looked at my rpms and they are not moving. So i parked the car for five hours and then a drove it again and it felt fine but then moments later in started again the car was hesitating to accelerate as if it was not getting enough fuel or something. I'm still thinking its my clutch or my tranny. But then i notice the car was doing it worst. So i park my car and without the car moving i can her the car is not acting right. So i accelerate on neutral and the car was hesitated. I'm going to change my fuel filter and see if that is the problem from what i have research people had the same problem and changed the fuel filter and that solved the problem. I have no Check engine light on yet so i don't think its an 02 sensor, however my mainteance light is flashing but then goes away if that helps. What else can it be? Also when i'm in first gear the car is not accelerating properly and start vibrating/shaking and i have change my spark plugs around 3k miles ago i need some advice.