If it is just WHD you are after; consider an 030 based board that allows a big heap of fastram.
As for the 060; I have an apollo but it is not getting very warm. I even have the trapdoor inplace. Then again, the apollo has the advantage of the cpu facing upward iso downward in case of the blizzard.
I highly recommend the 060 it is more fun than an 030 and is not that hot in terms of heat. The challenge is getting everything to work. Expect compatibility issues. But the horepower available allows your A1200 to do more things than would be possible with the 030.
