For what it's worth, I've had good luck with www.ikesound.com . I originally found them on e-bay, but I found out you can get almost the same price thru their website and you don't have to wait for the auction to end. Fast shipping, too.
But I've only bought hard to find Marine stuff. But everything has been absolutely new-in-box with mfg warranty. They do have a descent web site - updated recently to look alot nicer. They actually 'Stock' stuff, so they do let loose of last years models on clearance, occasionally, damn cheap.
Before you buy anything online, make sure they are authorized dealers. Otherwise, the companies will NOT honor the warranties. And anyone with car audio can tell you that you absolutely need a warranty...it pays for itself when you blow a sub or an amp. Just my .02