I'm looking at revisiting ABC watches; I used to have one when I did a lot of backpacking in my younger days, but they apparently are a lot smaller, more accurate, and cheaper than in the past. Does anyone here have experience and/or recommendations? Reasonable price, solar if possible, and ease of use are paramount. Deep water and cold temperature resistance would be a plus. I'm looking at the Casio PRG-270 and PRW-3000 and the Suunto Core models so far. Who uses one of these?