dnewma04,
Last years crossovers for the XR's didn't allow biamping. This year, the new crossover is made to allow it. Believe me, I was pretty damn excited to see that when they came in. So I traded the old crossovers for the new ones!
vinny,
I had these mids in my last car and I love them. I like the tweeters a lot as well. They are very smooth sounding, and the drivers actually produce a sufficient amount of midbass. Who knows, I don't keep stuff all that long anyway, I may end up putting the new MB Quart PSD's in. I had them before the XR's and like those as well. They are a very different sounding speaker. Personal preference I guess! As far as the subs go, those are up in the air. We put 2 10's in a Viper GTS we did and they sounded great. We shall see, maybe they will stay, maybe not?
cruises8