I made many changes to my componetry lately. The Parasound &
Sunfire TGII were replaced by an Arcam AVR300. I also have a couple of GT-40 tube amps as well.
The main problem I had with the TGII was that there wasn't any analog pass thru mode. Everything was digitized 1st.
Useing the Rogue strictly as a preamp for the GT-40's sounds unbelievable. Possibly better than the Arcam/Gt-40 combo and significantly better than the TGII/parasound. In all fairness to the TGII (which I still think is a great pre/pro), I never hooked the tube amps up to it.
My AVR300 is still breaking in. However, this thing is dead quiet. I'm not sure that it has the same soundstaging and air as the tube based rogue though. I'm very impressed with the AVR300 so far. Hopefully it just gets better.
My suggestion would be to ditch the TGII in favor of something that has the latest processing modes and a quality analog passthru such as the avr300.