The RTi line is being replaced with new models, which features revised drivers and a new. The RTiA line will hit stores in May. Ironically, I found little information about these new models on the Polk site (including their forum), but did read the announcement in the new issues of The Absolute Sound. The new cabinets will still offer the real veneer choice, but they will be curved cabinets - sort of like the Onix Rockets. The MSRP prices that were posted did appear to be slightly more than the current RTi line, but not horribly expensive.
I think this should become interesting when they get released. The RTi line has taken some abuse from people who didn't like the sound - and, it will be interesting to see how these fare. BTW, I have owned the RTi8 speakers in the past. To me, I appreciated the detailed sound. When it comes to the LSi line, one would need to get sufficient amplification to get the speakers up and humming. To me, they just don't sound good unless they're getting lots of juice. Then again, I don't think I'd purchase them because I do enjoy lower level listening and I don't think they'd please me.