Hmmm...$170, that's gonna be tough. I would look at some used Washburns, Alvarez' or Ibanez'. Can you get by without electronics for a while? If you got a straight acoustic you might be able to get a little more guitar for your money, then add a pickup later. Check out Dave's Guitar Shop in LaCrosse, WI, they do a lot of trading and occasionally have some affordable used acoustics.
Seriously consider trying to up your budget if at all possible. Once you hit the $500.00 range you can start looking at some used Martin X series guitars. I'd hate to see anyone drop $170 on a guitar then end up not playing it cause the action sucks or the electronics crap out a month after you get it.