I brought the Oregon 400t as my first GPS 4 weeks ago and have found it great. I have only used a few of the functions but have found 11 caches with it.
The touch screen works really well.
I am lucky in that I can chose it on the theory that the newest and most expensive must be the best. The 300 is proably just a good as it seems that the Maps that you can buy for it are more detailed than the onse that come with the 400t.
P an L