Between the EX and LX, engine-wise the EX has f22a6 while the LX has an f22a4 (I THINK). The only real difference is an EX has about 5 more hp. Also the stock manifold on an EX is essentially a 4-2-1 header. So if you're looking for a little bite of hp at a fairly cheap cost and don't want to go for headers yet, go to a junkyard, find a 4th gen EX and take the exhaust manifold off of it and put it on yours!

On the CAI thing, like I said it'll give you SOME hp but not much. I think I said 5-10 but it's around 3-5. It's SOMETHING and when it's used together with headers and a cat-back exhaust you see some decent gains. That's when it gets up around 15 hp. DRAG makes a turbo kit for our Accord but beyond that I'm not too sure. That's in my plans for a few years down the road. :naughty:

For speakers, I'm pretty partial to Rockford Fosgates. They can get a bit pricey, but they're worth it. Pioneer is another good one to look at, but only for stock size speakers. Their subs are less than perfect. I'd say that if you're just looking for some nice bass to fill out the sound a little more, go with a 10" sub in the back and some nice aftermarket speakers inside. The 10" won't take up a whole lot of room and you should get good response out of it. Actually, funny thing, right now I have my combo amp for my bass guitar in my trunk. It's a huge 15" single sub in a nice sized box with a small head. HEAVY AS F*CK AND HUGE TOO. I still have about half of my trunk space left. 4th gens have monster trunks. :thumbup: