I don't know, Their latest audio stuff has been pretty solid and on par with Corsairs audio stuff and Corsairs USB/Wireless Voids in the audio department are frakkin amazing for the price you pay.
Having said that I like Razers designs but even with THX their audio stuff isn't going to get vastly better, It will probably be new software for slightly better emulated surround etc...
If you want superb audio then go the dedicated AMP/DAC route and get yourself a good high end headphone like the Sennheiser HD650.
Worlds better.