These have the ceramic tweeter that I am so fond of (I consider it in the same league as the RAAL and good Be tweeters)!
I have heard a pair of bookshelf speakers from the same series (the Chrono SL-536.2) and making the reasonable assumption that these are in line with those, you'd need to get the Philharmonic DIY BMR's for the next step up in SQ, IMHO!
www.accessories4less.com
This is a lot of well-designed & well-built speaker for $1280/pr (7" mid-range and 2 ea. 7.9" woofers with down-firing port):
Edit: Don't be confused by the gloss black SL-596DC which is currently also priced at $640/ea.
If it doesn't have the XXX
.2 on the end of the model number, it doesn't have the ceramic tweeter!
That is the earlier model before the tweeter trickle down!