Honda Accord Sport 2018, OEM shocks and After market Lower Springs?

I'm thinking of doing a 1 inch drop with the H&R Sport Front and Rear Lowering Coil Springs, they go for about $250

Reason being I plan to add new wheels
20 by 9, which lowering is a must for new wheels in order to give it that sexy and more aggressive look to the car.

Will my shocks run into problems?

Capacitor, battery, or Alternator?

So I have a 2013 Honda Accord Sport with a single 12 inch sub with a kicker cxa doing 600 watts rms. This system dims my headlights. I just bought a dd712(D2) i plan on installing along side with a dd dm1500a which does 1500 watts at 1 ohm this is double the wattage from my old system so i know i have to upgrade one of the two and maybe even get a capacitor. I've called different car audio stores asking what I need to get upgraded some say i need alt. And battery uprgraded, some say I need just a battery, some say i need just an alternator. Can't figure out why i can't get just one flat answer. I don't know much about car audio but any info would be great. Here are some specs to the amp.

Cont Wattage @ 1ohm1500
Dynamic Wattage2300
Max Current Draw - Amperage230

2003 Honda Accord A/C issues?

My a/c use to be AMAZING but the starter went out and is set for a few months. When we replaced the starter and got the car running the a/c wouldn't run. I don't know why it isn't working. Anybody have any Ideas?

Honda Accord misfiring?

I have a 2009 Honda Accord that is misfiring. I took it to the mechanic and he explained that oil was leaking into a spark plug. He replaced that plug and the issue came back next day. I got the codes and was recommended to change all spark plugs and the tube/o ring. Will that fix the issue?