The RA definately sounds the best out the bunch, the LX's & FXO aren't bad either. Overall I think the sounds have definately improved - I've switched back to them from CSR, CSR may sound a lot better at full throttle but the LFS sounds are so much nicer and informative when at part throttle.
I did have to make a couple of adjustments though, namely turning the noise shaping stuff off on my stereo and turning the subwoofer down, otherwise everything sounded too base heavy.
Overall IMO the sounds are a big step up from before, of course they need more work but I'm happy with the progress being made, definately heading in the right direction.