RE: A radio to grow with
The ergonomic fit of how a radio feels in your hands is important. I remember how strange it was to me a couple of years ago when I soloed and first started flying with my radio instead of my buddy box!
Finding a radio that fits the way you like to hold them is definitely an important consideration. Don't be too quick to judge a radio on this point, however, as you tend to get used to one particular kind of radio and then anything else that's different feels strange. I hadn't flown with my 4YBF at all last year (the radio I actually trained with), I'd only been flying my 7CAP. When I first took the 4YBF out earlier this spring I just hated it for a couple of flights. Once I acclimated to it again, however, I've enjoyed using it. Now switching between the 4YBF and the 7CAP is no big deal.