I tried the combo a few weeks back and liked it. Didn't buy as decided to get a lightweight cab and use with my existing head. A combo isn't as flexible as a separate amp and cab and if, as you suggest, you may need more power at a later date, I'd suggest the LM3 (which is being sold at a good price at present) the way to go. You don't need to use MB cabs of course. Perhaps look at a decent used cab or two?