I'm in the process of planning a week to 10 day trip for the upcoming spring. Due to the fact that most of the water in this province is of the solid variety, planning my kayak trip and building a 14' Grebe for the kids will have to fill the kayaking void for the next 5 or 6 months.

The trip that I am planning is on the Winnipeg River, from Kenora in NW Ontario to (possibly)Pointe du Bois in Manitoba. I have ordered the maps and will tailor my take out point to suit the number of paddling days I have. I have fished some areas of this river and it is very wide in some stretches and can be quite confusing due to numerous islands and channels. I have convinced myself that a GPS is in order. I will be using the GPS for kayaking, canoeing, cross country skiing, and Mtn. Biking. I don't require maps of cities around the world or altitude information.
I have narrowed my search(unless you more knowelegable folks convince me otherwise) to either the Garmin eTrex $199(basic yellow model) or the Magellan GPS 315 $174. I read on a website, linked in an earlier post on this board or the Techniques board, that the type of antenna used in the garmin eTrex is somewhat less sensitive and therefore less effective with any sort of tree cover, than the type used on the Magellan's. Have any of you had any first had experiences(good or bad) with these or similar models? Are there other units that I should have a serious look at?

Thanks,

Ken