also consider the type of games you will be playing.. by this i mean the mag requirements.
if you plan to attend any of the milsims in the calgary area, hicap mags are NOT allowed (except for dedicated SAWs).
you will be restricted to midcaps, lowcaps and real caps.
although the rules on the number of mags you can carry change from time to time, typically (and if i remember correctly) midcaps are limited to 3-4, lowcaps 8-10 and realcaps are unlimited.
for skirmishes and the battlefield games, it doesnt matter and you can run with hicaps.