I didn't want to HIJACK the HT-5 thread so here goes:
The Fender SCXD has two 6V6 tubes and a 12AX7 I think; plus the digital modelling for the different amp sounds. So, for all intents and purposes, the tubes just warm up the DSP signal as opposed to being a pure tube amp.

Is the ISF feature in the HT-5 essentially the same thing or is it really a TUBE amp? I read all this stuff and sometimes my eyes glaze over.
If the HT-5 is really tubular in the classic sense, it sounds like an AWESOME amp.