suggestions for baseline mac

Miscellaneous Forums/MacOS X Discussion/suggestions for baseline mac

im looking to purchase a used Mac for testing compatibility with my BMAX code. i know pretty much nothing about Mac machines and am wondering what i should look for for a baseline Mac. im not looking for performance and will pretty much only use it for compile and testing of Mac specific areas such as file i/o. as far as special needs i think the only thing i need that may not be standard is OpenGL compatibility. here are a couple i have been interested in:

iMac G3
iBook G3

will either of these work or any other recommendations?

thx.