Well, if you are going to get into programming on the amiga, you might get the 2.1 dev cd. This happens to include StormC3 on there.
As a compiler it isn't in the same league as gcc (H&P recognised this and moved their compiler backend to gcc with v4), but it is very easy to get started with.
Then there's GoldEd, which with gcc makes a pretty good environment for development. You've also got CubicIDE.
If you want to develop compact highly amiga specific code, good old SASC is still well regarded.