Be a little careful choosing which aircraft you train in - the 300 is, by all accounts, a much easier and more benign aircraft to learn in, but there are rather more Robbies around (both R22 and R44). The best training aircraft for you will depend largely on what you plan to do once you're trained; if you're planning to transition to an R44 pretty much straight away, or money is an issue for you, you're probably better off training in an R22. Alternately, if you're planning to SFH from your local school and fly yourself around for the foreseeable future, and they run 300s, then you're probably better off sticking with that.