The 346XP is a great saw but here in Canada it prices out almost $200 more all in than the MS261, and right now the Stihl includes an extra chain and carrying case. Husqvarna Canada charges a huge premium on their XP line over here.
I don't know if you've looked at any Dolmars joed, but the PS-5105 goes for about $520 here before taxes and feels more nimble than the MS261. Might be something to consider and if you don't mind an extra pound and wish to save a few bucks there is the PS-510 which is around $430.