The Classe is still better sonically all around, for sure. The lex has goten better musically, but still not quite the audiophile experience you'll get from a Classe. If you have to have 7 channel full nuts home theater, with EQ's, crossover flexibility, 7 channel logic, etc., then the Lex is for you. if you really enjoy 2 channel, and won't get a separate 2 channel preamp for whatever reason (actually, i think you'll find this the better/cheaper alternative in the long run), then the Classe is a better chioce, and still cleaner and more refined for Digial movies and such.
Another choice is to buy the less expensive Classe! It's as good all around for all practical purposes, and you'll even have more money left over for a quality 2 channel preamp, which you could loop your system through..thus taking advantage of quality 2 channel high end, and then great digital movies with the Classe! (works for me).
Another choice to consider, if you really value the integrity of your music, but want some more features/flexibility with your HT playback, is to look at somehting like the Aragon soundstage. It's not only got "pure dirrect analog bypass" like the Classe's, but it's go the invaluable "advanced bass management" to adjust your crossovers to each channel maximally!(80hz is a bad cross usually, and full range isn't any better with most speakers..which can't handle it properly).
I personally, use the superb Acurus Act 3, which is as clean/detailed/musical as any for HT dubties and digital playback mostly (some are a shade better here, but mondo more money!...hum?...). I have the Acurus looped through my two channel preamp, which is a passive/active Class A rated Pass Labs preamp. I then get the best of both worlds for less money...it's a thought. good luck..