I think it was the early models that were running hot. I'm fairly certain that the later models fixed that (like the 1.25ghz).

On a side note, I've been going through a bunch of iMac DV era and eMacs and preparing them for donation. No dud eMacs (yet, out of 4) and only 2 bad, possibly 3, iMac G3s from a lot of about 20.

For the age of both I think that's pretty good.

Go for it!