Need advice on my sound system, Speakers, amps, subs Options

[shid]

Hey guys, I'm looking to upgrade my sound system and have been running through a couple of things.

My main goal is to have a system I can hear on the freeway, going 90, with the top down without distortion. I don't need to win decibal drag contests.

I mostly listen to rock, techno and rave- with a few rap and R&B songs stuck in to make myself look like an idiot.

So, I was thinking to just amp the subs, and not amp the speakers? (I have a stock amp in there, but I don't know what kind of power that puts out).

My current headunit is an Alpine9803 with 50Wx4 and 2 preouts. I don't plan on changing it with my new speaker setup.

As for my new speaker setup, I was thinking that for the front components:

Polk Audio db6750 or
Alpine Type S SPS171A

For the back:

Polk db675 or
Infinity Kappa 652.5i

I'm learning towards the db6750 for the components, and the Infinity's for the rear.

Now, for the subs, these are going to go in the trunk (unless someone has a better place to put them besides the front doors). And I need to hear these with the top down- BUT, I also need my trunk space- so nothing too huge (or heavy, preferably).

What can you guys recommend for an amp? I'm not looking at anything too expensive, but I don't want it to crap out on me.

Amps?:

Sony XM-D500X ooorrrr.. I have no idea, I have no idea what I really need

Subs:

The space issue is making me consider tubes a lot more than sub boxes. I just don't think I have the room for a sub box- no way. I was also thinking 8 inch or 10 inch- I don't listen to rap a lot so there's no need for a 12- and the 10 or 8s provide better sound for rock and techno anyway right?

Maybe 2 Bazooka RS104DV (10 inch 250w per coil)

Whats the benefit of more power to a sub? louder? What would 2 subs get me vs one?

Please help

Oh yeah, and any ideas where to put the amp?

--Sean

[Crzybakerdog]

one thing to take into account that most people dont realize is that unless you install it all correctly anything will sound like crap. My uncle told me about a time where someone put like 8 subs in the car and a bunch of tweeters and what not anyway to make a long story short the car sounded great when it was off but once the sound was on and the car was on it shounded like sh** because the guage wire was picking up everything from the engine so they could basically hear engine components through speakers. though he did recommend to get the wire you want and twist it so it acts as a shield and doesnt pick up as much interference. not sure if wire is sold twisted but it would definetly be worth your time to do it. just my .02