i dare not get into a discussion about the best pre/pro available. however mixing brands of gear is perfectly acceptable. specs really reveal little about the quality of a unit, however you seem to be interested in a certain set of features, so to find those features in a pre/pro available right now is going to seriously limit the field of candidates. which is good, because then you will have less choices...

thd is something good to look at for amps, .1% is not that low though. basically an amp needs a big power supply, big capacitors, good heat sinks, decent engineering to be good.

ill let you decide about the pre/pro because theyre arent too many that would have the features that you want anyway.

------------------
This post has been brought to you by curegeorg, thanks for reading.