Clean perhaps, but definitely not flat.  Running two preamps generally gives bad results.  In fact, I would recommend the Dr. Z preamp instead.  I believe it will do a better job.

Don is right though, it makes more sense to submit a request.  I will make a similar request as well and ask that you consider duplicating my request that footswitches be given the ability to toggle multipe effect parameters in addition to enabling/disabling multiple effects blocks and send MIDI commands; all simultaneously.

When I say similar request, I will ask for the ablility to split preamp, poweramp and cabinet/mic emulation so that effects can run in between any of the three, as well as mix and match preamps and poweramps.  I think I've finally dialed in a pretty realistic Mesa Mark Series type of tone and this enhanced flexibility will allow people to record without having to use an outboard emulator.  If I were to run direct, I would need to use my DigiTech RP1000, which does allow one to use a cab emulator without an amplifier model.