<font color='#000000'>I recently bought some B&W 700 series speakers (specifiically 705, HTM7, and DS7). I do like them. There is some slight sibilance but that might be from the room. Audioholics favorably reviewed some bookshelf speakers manufactured by Von Schwiekert recently. The MSRP of the Von Schwikerkert bookshelves is $995/pair, which is significantly less than B&W 705. I had not heard of Von Schweikert before I ordered my B&W speakers though. In any case, if you decide to buy the B&W 700 series speakers, you might have to wait a long time to get them depending on where you live. I live in NJ and it took 6 weeks for me to get the 705 and HTM 7 and another 2 weeks to get the DS7. Also, try to avoid paying MSRP.
One neat feature about the DS7 (and all of B&W's on wall speakers, I think) is that you can connect a 12 volt trigger and switch the speakers from monopole to dipole w/o flipping switches on the speakers (which is a real pain because the switches are located under the front grille).
I have listened to the 705 and 602S3 at a dealer and the difference between the two (besides aesthetics and price) is a VERY slight increase (perhaps just my imagination) in detail but a VERY big difference in soundstage, depending on recorded material of course. If all you are looking for is a better crossover, you might want to consider removing the crossovers in your current speakers and using active crossovers. (you should only do this if your warranty is expired b/c opening the speakers can void the warranty.)
By all means, listen to as many speakers with different manufacturers and model numbers as you can.</font>