I've got a Vertex VHF radio.  Very very handy and I got it for the same reason you mentioned ie keeping in touch with party members or with SAR if all goes wrong.  Esp if you get a whip antennae you can hit repeaters.  Even with line of sight reception/transmission is v good.  Basic politeness if to ask permission to get the correct codes for the repeaters - eg in the Bugs you would call CMH Bugaboos and ask for permission and don't always expect it to get granted.   
  
Here's a good place to get them http://www.mparam.com.  He can do modifications for you and he can set you up with what you need.   
  
I got the Vertex VX - 170 btw - very tough.  Its taken falls, dropped on snow and ice, basically beaten the crap out of it and it still works great.