CMSS-3D was superior because it had height filters and environmental effects, and it looks like renugaid (renegade?) ran it through the Straight Enhancer to tweak bass and treble response. Possibly also to use the receiver as a headphone amp, as well. In this case Straight Enhancer is taking the place of Creative's Crystalizer, both functions are designed to upsample compressed music and smooth out harshness from compression while "guessing" what sounds were lost at the extremes of audible frequencies, namely increasing bass and treble extension. My Recon3D also has Crystalizer, I hated it because it made treble even more harsh. Though I did test a similar setup as renugaid where I plugged my Recon3D out into my Yamaha receiver, I didn't think to add Straight Enhancer... my guess is it would enhance the tone but soften the detail just slightly, since Crystalizer and Straight Enhancer are designed for enhancing 128 Kbps MP3 music, not game audio.
I think it's interesting that this thread essentially came up with the same DSP parameters as me, though I didn't realize room size and delay could be adjusted. I basically feel the DSPs are like Creative's EAX effects, but I like to minimize the effect since it sounds like you're always in a cave (and many games don't take place in that environ, at least not all the time). With consoles, you're just going to have to rely on the game's filters for height (a rare filter), environment, and distance, because the receiver isn't going to know the "where am I?" data, just the 2D 5.1 or 7.1 surround feed.
I'm still surprised every time I see Kool Bubba Ice was banned, he was pretty prolific in the same threads as me when I first joined Head-Fi.