infinitys pound and have really good sound quality. they hit low and really clean and have a 3 year warranty if anything ever happens to them im talking of coarse about the perfects, the lower end infinity stuff is good but their high end stuff is amazing. MTX has some really nice high end stuff too. heard one 15 in a bandpass box in H.H. Gregg and it rocked the whole store. Good luck with your searching.

Amps, DEI is always nice they make PPI.

MTX is mid range, fosgate is mid range, JL is the higher end of "consumer goods".

Speakers, avoid sony, no name brands,etc. Good ones for the money are infinity, JL, some mtx or fosgate components, upper pioneer, polk audio. Upper end stuff is Focal, JL, Diamond MB Quart.