I know it depends on the band and how loud the players are, the size of the space you need to fill and whether you have PA support, but I don't reckon a 1x10 or even a 1x12 would be loud enough for a rock band. Modern gear is unquestionably much more efficient than a lot of old school stuff, but there are limits - the laws of physics, Jim and all that.
If you have a reasonable amount burning a hole in your pocket, you really should go and try/audition some gear. I appreciate that there may not be a wide choice in the Highlands, but buying on the basis of recommendation alone is often a route to disappointment.
Rumbles are a standard recommendation, with good reason. They are portable and good value. However, they do sound a bit generic and I don't think one would improve on what you have.
If you like your MAG 210, keep it. 22kg is hardly a behemoth and a quality folding trolley would make life easier and cost far less than new gear.