Thanks for all of your suggestions here, particularly the note about difficulties taking RideWithGPS exports into the eTrex. It sounds like I can accomplish what I would like to with, say, an eTrex 20 and the supplemental CNNA maps which would run $270 or so plus tax and mount. Right around that $300 price point. The ultimate question is whether it's worth the expenditure vs just a set of maps and a cue sheet. I may swing by REI to check out a few units, their prices seem to be in line with other vendors and their return policies are fairly liberal.