ALSO,

Do I have to worry about OHMs when buying my amp, or speakers?

 

http://www.ebay.com/itm/JL-Audio-XD-...item2ebfc6f35b


Would this amp work? its a Jl audio 500/3

 

Speakers, not really, most are 4 or 8 ohm, so any amp can drive them.

As for that amp, it's adequate. Not much headroom on it, so it's going to be working at 100% capacity just about 100% of the time. It's preferable to get more RMS watts than your speakers and subs require so that the amp isn't stressed. That's why I recommended the stuff I did at he budget you were asking about.

 

lol, i got quoted $3k for head unit, 4 speakers, 2 amps, and 1 sub

 

If it's JDM trim, a flagship headunit w/nav & every bell & whistle, 4 really nice speakers and a solid sub in a custom ported box, that's a fair price.

JDM: $300+
nav headunit: $800+
two pair nice component speakers: $700+
Custom fiberglass ported enclosure: $400+
Good Sub: $250+
2xAmps: $600+
Wiring and misc. supplies: $80
Labor: $400+

And that's nowhere near going with *really* good components.

$3k could be a great deal, or a rape.