They look pretty impressive.
I'll wait out 3dss.com's review of them before I make any sweeping statements, but the 4.1s seem to have quelled all my complaints on the v.2-400s and thrown in headphone jack for good measure.
I'd have like to seen a real power switch....but the on/off switch should be good enough really.
Now if only they'd make them with an integrated Dolby Digital Decoder (4.1 would be fine, I don't mind a ghosted center, but an RCA input for DD decoding would be nice

)
Of course very few speaker sets have 4 channel analog input and dolby digital input, and those that do (*cough* dtt3500 *cough*) don't belong in the same thought as a Klipsch set.