I run their pre-amp. It's great... you need to change the stock tubes in all their gear though as they use cheep tubes. Tube amps are generaly though of as havinf more uuummmphh than a solid state amp. Without getting too deep into it, it's because most tube designes output more current than a similarly rated SS design. This isn't always true (see full Class-A SS amps) but it's a good rule of thumb. My Rogue puts out about 56 wats in Ultralinear with KT88's (at clipping) and it tosses my Fabers around like Jello on a rollercoaster. I rarly turn the gain up to 12noon on the AES and the house next door is shaking. Buy tubes, listen to tubes, love tubes...
That said, I'm thinking of selling my Rogue 88... I love it but I have had it for a year and a half and I just like to change my playback system now and then. There is nothing wrong with the amp (just changes the bridge rectifier last month actually, just in case) If anyone is intrested let me know. I paid $650 for it with one set of tubes (EL34)and I now have 2 sets of input tubes, the EL34s, 6550s, and KT88s to go with it. It is an auto-bias design so no pulling it apart to adjust bias every month and a great intro to tubes. Not sure what I want to get next but I'll think of something