give me the "whirlygig" anytime
A-hem... you called?
Although I have never flown a Bell47 and have half an hour in an R22 (my time being S300 and B206), if cost is not a factor, I'd go for the B47. Even if cost were a factor, I'd probably still go for a B47!
Given your ambition, I would suggest that the Bell is the better aircraft for you to train on. If you had ambition to be an instructor and R22s are the most available training machine, then I would suggest it may be better to learn on one of those.
Cheers
Whirlygig