Sorry for being off topic, but the Tandy Coco3 reference I thought was cool 
A Coco1 was my 1st computer, I even upgraded it to 64KB. My older brothers mate had a Coco3 some years later when it was released. Great 8bit machine. I loved Gantelet2 (not a typo, just an unofficial, commercial clone) on it. Actually pretty close to Gauntlet2 on Amiga and AtariST.
Id love to get ahold of a Coco3 myself one day.
Nostalgia, it's not what it used to be 
I managed a Radio Shack franchise at one point, so I've got a soft spot for those machines.
They lacked the sprites and audio hardware other systems had, but the GPU could use the entire memory map (since GPU access to memory was interleaved with CPU access).
And the 6809 processor was a lot cooler then the other 8 bit CPUs used in other machines. I think the reason I moved to 68000 based systems was the experience I gained learning 6809 assembler.
BTW - There's a company called Cloud-9 that still has Coco3s in stock and they make a line of accessories (memory expansions, hard disk interfaces, etc.)
http://frontiernet.net/~mmarlette/Cloud-9/Sorry everybody for posting so far off topic (and yes, any Amiga model outperforms the a fore to mentioned machines).