The difference in ART gear like the tubethisorthat and such and the MPA,VLA,Gold MPA is night and day. They are simply completely different pieces in both quality and technology.
Its unfortunate that many relatively good pieces of gear get poor reputations without any user history to justify such rep.
Just because one piece from a company has issues doesnt mean the entire company lines do so.....though there are exceptions. As for ART. At least all their pieces, no matter how they sound, will stay together....unlike a couple of 'others' that come to mind......
I have a very old MPA myself and it still gets used for a lot of things. Changing the tubes is a big plus......The Pro Channel strip from ART is also a nice piece. The compressor is very useful and the EQ, though limited, can be just the ticket on some sources.
None of these pieces should be confused or even compared to 1K per channel mic pres.