Sim W-5 vs Pass X250 / X350 with Dyn C-4


Has anyone used a Pass Labs X250 or X350 with the Confidence series of Dynaudio speakers?

I currently have a Simaudio W-5 driving my C4's. On occasion with 2-channel music, where I run the speakers full range, it seems to possibly run just a tad short of punch and I was considering a more powerful amplifier and was looking at the Pass Lab X250 or X350. For movies I have never noticed any shortness of punch, but for movies I run the C-4's crossed over at 40 Hz and the lower end routed to the sub.

I would love to move to the Simaudio W-8 or a pair of W-6, but the cost, even for a used unit, is beyond what I want to pay.

The thing I like is the Simaudio W-5 mates well with my Simaudio Titan that is driving the center speaker (Confidence Center) for movies and I might not get that match with a Pass Labs unit. It also drives the surrounds and rears.

Any thoughts or experience on the mattter would be beneficial to my decision.

Current System:
Preamp/processor - Anthem Statement D2v
CD Player - Arcam CD192
DVD Player - Denon 5900
Preamp/Amp Interconnects - Balanced - Canare
Speaker Wire - Kimber 8TC for fronts
cyclonemike
is the .5 series a bit warmer or easier on the ears? It seems there have been a lot of comments about the older series being a bit dry. I have the W-3 and I do not find this the case at all, but I have a warm pre and forgiving speakers. I also like the sense of depth, soundstage and air it presents in my system compared to other more expensive amps that I have. Anyone heard the Evolution Series?
What would be a better match for the 5.4 pass X250.8,X350.5-X20 or Sim 740P-W8? I dont want the thin harsh at mid to high volumes, and don`t want the midrange to over shine the low end when cranked up. Smooth and detailed need to blend even at low volume with air between instruments in a 3D sort of way with some slam if needed. Anyone have any suggestions?
The 5.4 is less refined than the c4 so I would say x350.5 or the Pass XA series
dskinner5-

at this level of price and performance, get an audition of the Pass Labs/Sim Audio, prior to any purchase. Happy Listening!
I have had the chance to demo the Audio research Ref 6. I will say it sounded great. I just cant get to the pricetag of a new one right now. What is a comparable pre ? BAT, REF 5 SE- has anyone had any experience with the DAC reference from AR? Any help would be appreciated. I almost was ready to buy a Music Server Aurender A10 and connect it to my amp. How would the sound differ from using a preamp? Thanks