As others suggested, give the amp minimum 300+ hours before you decide. I'm saying this from direct experience with the INT-25 which I still own and I think this is the best amp money can buy under 10k. I was also "meh" at the beginning and was not sure if I did make side or forward move (previously have owned Pathos Classic MK3). But after approx. month and a half the amp opened up like crazy. The transparency, instrument separation, soundstage all of this improved. You have a great amp in your hands, don't loose it :)
Pass INT-25 better than Wilsenton R8?
I have recently purchased a Pass Labs INT-25. It replaced a Wilsenton R8 with NOS tubes (EL-34). I feel that the sound im getting from the Pass is not 5000.00 better. Has anyone purchased a INT-25 and not been blown away from the sound? I do think that the 25 has a wider soundstage.