There are actually 3 different Alivios for sale as far as I can tell.
Square taper 7/8 speed, Octalink 7/8 speed and Octalink 9-speed. Often you can run an 8-speed chain on 9-speed chainrings OK, haven't tried it on ten-speed.
Chain Reaction in the UK lists both 410s and the 430 having replaceable chainrings.
For touring I think I'd want an old-school MTB crankset or a road triple personally. A 48T big ring would be nice.