Never tried the 395, but I prefer 2:90 over the 400 for a guitar rig. Ran mine (2:90) with both an MP-1 and a Triaxis...awesome power amp that responds much more like a real amp than the 400. The 400 was cool but was much more sterile sounding IMO...probably why audiophiles started using them in their systems.
Play both if you can and decide from there.