A Color Classic with a 550 logic board is indeed a thing of beauty (I have one).
I have, however, recently acquired (by sibling proxy and at a distance of a 2 hr drive) a lot of parts which has in it an LC520 logic board, and once I get my hands on it, will also be trying it out in the CC.
The 520 is similar to the 550 except that it runs at 25MHz rather than 33MHz. Like the 550, however, it does have a 32-bit bus, and can accept up to a 128MB 72-pin SIMM, so it would make a huge improvement over a stock CC. We'll see if it works.
I have, however, recently acquired (by sibling proxy and at a distance of a 2 hr drive) a lot of parts which has in it an LC520 logic board, and once I get my hands on it, will also be trying it out in the CC.
The 520 is similar to the 550 except that it runs at 25MHz rather than 33MHz. Like the 550, however, it does have a 32-bit bus, and can accept up to a 128MB 72-pin SIMM, so it would make a huge improvement over a stock CC. We'll see if it works.