Look, I'm not trying to knock your setup, I'm trying explain why someone might buy a Wyred vs an unmodded Icepower amp vs another amp.
Anyhow, you seem a little confused about the DCX is doing, so let's start there:
Your BAT pre provides input switching, tells the DAC in the DCX how loud to go and imparts it's own sonic signature. It's a stupendous piece of gear that could probably drive the tweeters in the CS2's with no amp at all, if you were that crazy. But in this setup, all it's driving is the A/D of the DCX. I'd disagree with GV#27 and wouldn't even say that it provides gain... Semantics, but it more "sets" gain; the DAC & opamps in the DCX provide the gain.
The DCX takes the signal from the BAT and turns it into digital bits, does some fancy algorithms on them (crossover, limiting, gain,eq, etc), then its DAC changes those bits back into analog signals. At this point your SOURCE is the bits coming off the algorithms and your PRE is the DAC in the DCX. This goes into some $0.59 opamps (or $2 opamps with the upgrade) and out to the amp. Gain is determined by the DAC; It is set by the digital algorithms and the level provided by the BAT.
Now, the DCX is an amazing piece of engineering for $250... but it's also a stack of cheap chinese parts. I've had two fail on me- one had a channel die (coincidentally the one that was driving a 500asp; the rest were driving a bryston) and the other needed a ribbon connector re-seated when it got hot. Google that and you'll find hundreds of people that have had DCX's fail. The pro guys that I hang with either won't touch them or always keep a spare on hand. Those opamps should have no trouble driving 8kohms, but if you're worried about it, some kind of buffer might be a good choice and 50kohms is gonna be a lot easier.
Anyhow, back to the original topic:
I look at the Wyred mods and say "Meh". The test is always your ears, but nothing there is addressing the major failings of the stock ICEpower module. Like Zero said, it still sounds like icepower and maybe you like that, maybe you don't. I like icepower just fine on gallos, my "ghetto gallos" and some other experiments I've been playing with. It sounds absolutely horrible on my Jordans & Fostex. Regardless, I'm looking forward to seeing the results of that shootout between the D-sonic & Wyred- I've been itching to start clipping parts off my modules, but have been focused on other things lately.