IMO "One size fits all" is the right way to think about buying gear. All rigs can play quietly, so you are making decisions based on the loudest you're going to play. IMO separate amps and cabs are a better idea. Then you can up upgrade each part independently.
Your 200 watt Elf is only 100 watts into 1 8 ohm cab, when it is flat out, and flat out probably won't sound too good. So you're realistically looking at using 50-80 watts. Is that loud enough? I'd say probably not.
I play from very loud to a whisper. I have one rig that does it all, a 700 watt amp and 2 112 cabs. That's 700 watts into 2 8 ohm cabs and 350 watts into 1 8 ohm cab. I want a clean sound so I don't run the amp with the master beyond 12 o'clock. Having more watts on tap than you need is never a problem, not having enough watts is always a big problem.
My suggestion would be to start looking at 500 watt amps and good 112 or 210 cabs.