This isn't the answer you want to hear, but I find I'm most efficient using Visual Studio with either VBCC or a gcc cross-compiler. Staying 100% Amiga is great (and sometimes fun), but going through the motions on a real Amiga is a bit painful. Coding under WinUAE is a huge improvement. If I weren't using Visual Studio, I'd code with WinUAE, GoldED, and VBCC. (Of course, GoldED--now part of Cubic IDE--includes everything you need to code C/C++ out of the box.)
If you're able to find a complete SAS/C package (they show up on eBay every once in a while), you'll still receive free phone support from SAS for issues with documented solutions.
I also use StormC at times just to make sure my cross-compiler is working properly. . . .
--Styx--
I saw Dennis DeYoung perform with the Sacramento Philharmonic Orchestra, the Sacramento Children's Choir, and a touring "rock" band last year. Excellent performance, although tainted with pro-war, anti-muslim banter.
Trev