have not tried the two piece...
just thought I would put in another vote for the Extreme +... I use it with a DUI flex 50 (upper half trilam, lower half DUI's "crushed neoprene").
I have used mine down close to 3C, very comfortable. I did have the venting issue on occation as well. (I'll be trying WediveBc's fix on my next dive, thanks).
hoppyinca
