Well yeah, but then again.  The Rebel 20 can do that job just fine.  Especially if you want it as a backup.  If it's a backup, there's no reason to complain about lack of reverb, or decreased headroom for example.
I do get your point, but you also need to understand that there will be many other customer wanting their own niches filled.  Solving your situation, might very well mean, adding at least 3 other models in order to fill the needs of other customers too.  Who knows, it might happen.  But in my experience, adding too much, is exactly that.  Too much.
-Danny