I'm kinda partial to Yaesu in general, and specifically the VX-7R. http://www.yaesu.com/indexVS.cfm?cmd=Di ... Archived=0
It can operate on the two main bands (70cm and 2m) and also has limited abilities on 50/220. Capable of actively listening to two frequencies/bands at a time (monitor one while using another for example) and is small and EXTREMELY ruggedly built. Retails for about $350, plus accessories (and you'll definitely want to add a spare battery (and perhaps the AA battery adapter), and upgraded antenna.)
I've been using this radio now for a couple years and can't find a fault with it other than the interface taking some getting used to. Yaesu, in general, requires a little more of your time in getting past the learning curve of their radio interfaces, but once you do it's a really efficient setup.
If I were starting over again and wanted the top of the line, I'd go with Yaesu again, but probably pick the VX-8GR.http://www.yaesu.com/indexVS.cfm?cmd=Di ... Archived=0
It's "only" dual band (70cm and 2m) but since the other bands on the 7 are limited on power output (and not many people use them anyway) they're more of a toy than something for utility on the trail. This one also has built in GPS/APRS capabilities which can effectively make your radio into something of a SPOT-tracker-like system with a little learning. At the very least, I'd like to have the extra device that can tell me my current GPS coordinates and cardinal direction of travel (it does NOT do mapping like the GPS's we normally use on hikes though, so don't expect to replace those.)
Cost is $20-$30 less than the 7r, although you'd still need extra batteries and a real antenna (antenna thing goes for ANY radio you buy. They always come with a truly crappy rubber duck antenna that isn't worth the cost to ship it.)