Need a Speaker Recommendation


So, I'm putting together a secondary system composed of used components. My budget for the speakers will be in the $400-$700 range. The speakers will be paired with a Rotel rsx-1056, which I believe produces 100 watts X 2 into 8 ohms. So far, I've been mainly considering B&W speakers because I am most familiar with them (leaning towards 603 S2 or 602 S3). However, I'd like to hear any recommendations you guys have for an alternative speaker that can be found used in this price range, and pairs well with the Rotel(any brand, bookshelf or floorstander). The room is square shaped and approx 18' X 18' with a very high ceiling. I appreciate any advice you guys have--and please take used availability into consideration. Thanks.
rossbernstein
A consensus is building here.
A pair of used Vandersteen 1Cs is one of the best bargains out there. I've owned them twice and loved them both times.
Only issue with Vandys is that you can't take them apart to look at stuff, and cats can (and will) rip the crap out if 'em. I had some new 1Bs and after my cats messed them up I sent them back to Vandy to have them recovered and tightened up (I called Vandy and actually inadvertantly got Richard Vandersteen on the phone...asked if since they had my speakers could they please upgrade them...he bit my head off...said something like "the newer ones have EVERYTHING improved so NO WAY DUDE"...a treasured audio moment). Sold them to a friend when they got back as I couldn't stand to see them subjected to feline abuse again. The end. Oh wait...also they sounded AMAZING.
Thanks guys, that's really eye-opening information for me--I've never heard these speakers but I will make it a point to go find a pair to audition now.

Wolf_Garcia: thanks for the info--my gf has an annoying cat named Zippy that will definitely tear them apart so that's really good to know