Those GPS receivers are very different in functionality and price. I think you must first decide what you want to do with the GPS device, is it only tracking then buy the cheapest logger, do you want to go mountainbiking and don’t want to get lost, go for a Garmin with color display (the GPSMAP 60 CSx is very nice, but a Vista HCx is very good value for money).
What’s good with logger is that you just start it and BAM! you are done, what’s bad with them is that there is little feedback even on the m-241 with a LCD. BTW I used a Garmin for logging recently and it started to overwrite its track after ~2 hours. Very bad, luckly we had a datalogger running as backup.
Is the M-241 so battery demanding?
That’s crazy. With backlight off but showing a map a Vista HCx on 2 AA eneloops gets about 25 hours, while showing OSM maps and mtbiking and recording tracks to microSD. Even with backlight on at 100% you get 12-13 hours. The 60CSx gets about 30% shorter times (maybe less difference with full backlight, which is not as light as the one from the Etrex series though).