I have narrowed it down to a few sets, and would really appreciate your opinion and knowledge concerning each set, as I personally can not hear them before purchasing...I can't decide between Alpine SPX177A Alpine SPX177R What is the difference between those two sets? Which is better?...Also MB Quart PCE216 Diamond Audio M661 Eclipse SC8264 or the FOCAL 165A ?......Those are all under $280.....These next are $300, but I do not know if it is worth it? I would like to stay under $300, but if one of these are worth it, then please let me know..They are Diamond Audio S600A Eclipse SC8365 FOCAL 165V2 Image Dynamics CXS62 Infinity Perfect 61 JL Audio XR653CS PolkMomo X107MMC650 Thank you for your time...I really appreciate any info and opinion as I can not listen to these prior to purchase...Thanks again.