Honest feedback on that rig: I'd be disappointed in the head and less than thrilled about the cab, though I'd live with the cab.
Lots of times though at practice I just wanted to play my rig because it's my rig. It's really good equipment, and I want to let those horses run. Maybe many guitarists don't have great tube heads so they see the amps available in your studio as a step up from what they have. I almost always see rehearsal studio amps as a step down from my gear though.
If I'm going to use a rehearsal studio rig, I want a really powerful, snappy, controlled amp and a lot of control over my eq. The ampeg head doesn't give me that. There are people who'll think I'm crazy for saying this, but I've never gotten a sound I like out of an ampeg head, to me they sound nasally and mushy. The cab is ok, but I like more high end frequency response and that cab rolls off at around 5k. There are worse cabs out there. If you had a big QSC power amp with a flexible preamp, one of the more recent Mesa heads, a MarkBass head, a Quilter, even a powerful Rumble I think I'd be ok with it.