A2630 accelerator - 040 upgrade possible?

[ElPolloDiabl]

One of the best reasons to have an 040 is the massively fast math. Your LC model lacks the math unit. Keep searching and get a full 040 it will be worth it. Only downside is they run hotter than the LC version.
If you've got a 2630 fit it out to the max and stick with it. Although the 040 will double the speed it will cause bugs in a lot of programs (mostly games) the 030 doesn't.

[ElPolloDiabl]

presence (or lack of) the FPU wont create any noticable difference except for the apps that specifically use it (3D stuff, some spreadsheets, and database apps). workbench doesnt use the FPU at all AFAIK.

Any video decoding or audio decoding programs (like mpeg mp3) use the FPU.