I've been gigging the Roadstar 36 (non TT) with 6V6's and valve rectifier for over a year now. I play indie/rock/pop covers in my bands, the amp's been out pretty much every weekend. My amp sits somewhere between marshall and fender, the cleans are clean but with a slightly harder attack to them, than say a Twin etc. The amp is amazing with pedals, and you can hear very subtle differences between guitars. I play quite loud so i normally have the power amp just clipping, so there is a touch of grit to the sound, easily cleaned up with the guitars volume control. Also this amp has made me think about using the guitars tone control's too, very responsive amp.
Can't comment on the EL84 TT version, not until Martin completes my next ordered amp 8)