I think it depends on what you're looking for. I have the Strategy and I have to dial back it's mids to keep it from drowning out the rest of the band. I A/B'd it side by side against an SVT/410 and chose the Mesa because I felt it had a more aggressive sounding midrange compared to the SVT, which was of course very classic (and good) sounding.
I don't use the Strategy's graphic EQ except to cut some low end at home so I don't shake sh*t off my shelves... never needed it live.
IMO, the problem with the Prodigy/Strategy isn't that they lack mids or that they don't sound "tubey"... it's that they don't sound like an Ampeg when that's what people are actually looking for.
Also IMO, you should get a Mesa if you like the sound of a Mesa, not because you think it's some sort of lightweight Ampeg.
Agreed, I do like the Mesa sound. Besides, when I need Ampeg: I have that as well as Orange and some Traynor pre's as well.
That's an added bonus to potentially getting a 400/+ is even more variety
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