KoenDercksen
Quantum Realm
If you're talking about using a regular home stereo as a way to hear the Axe, provided you've got the cables you'll need, yeah, it'd probably work. Might not sound all that spectacular, but I'm sure it can be done.
As for the cab advice, again, it's subjective. It might be just fine for you, using a 1x12, 2x12 or 4x12 cab instead of the Atomic Reactors. I mean *eventually* you'll probably want to get something else, but with all the ins/outs on the Axe, you can pretty much use whatever you want. Will it sound great? It might sound great to you, just depends on your style and taste. You could get a couple of cheap 1 or 2x12 cabs (for stereo) and a solid state (or tube) power amp and be fine. Just depends what you're going to use it for, i.e. gigging, recording, low-volume bedroom jams, etc...
I'm planning to use it as my regular amp, so for recording and bedroom/drummer jams mostly. Sometimes I'll have a gig, might be more frequently in the future...
How about the Atomic reactors, do they provide enough volume to be on a stage without further (PA) amplification?
I was thinking I could also just get a powered full range monitor and use that as a speaker/cab instead of those expensive AR's... But it'd probably not sound as good