JKabat,
I have been using Code Composer and Stellarisware and have been very pleased with both. While I like and use Linux, I don't have the time to figure out how to set up the tools to develop for Stellaris thereon. If someone comes up with a one-button install, that would make me take another look.
I have used many of the same micros as you, and "Obsolete" microprocessors are an interest of mine. I have a particular interest in the 1802.