I would say hold off buying the ACR if you can for the MicrOfix100 from ACR to be released in the July time period. If you need it sooner then buy of course the ResQFix or preferably the microfix. Another option is to rent one when you are going out and buy the new one when it is released.

ACR Announces Next Generation PLBs

http://www.equipped.org/blog/?p=104