Yeah, it certainly runs great on here... I may even put it on the eMac as well... it has the 1.42 and 2 gigs of ram.
As for Flash, yes....Flash 10 makes a huge difference, especially in online game performance. The games aren't choppy anymore. As far as boot times, I can't tell a difference, they both seem the same but I am going to see.
What's even better is I just bought a dual 1.25 off eBay...it will be here soon.
I talked to a few people and determined that there is a reasonable performance difference between the 1.0 Dual and 1.25 Dual (Probably the 2MB L3 Cache as opposed to the 1MB), but not much of a noticeable difference between the 1.25 dual and 1.42 dual. So hey, for $30, I can't complain! Combined the 1.25 is a 500MHz upgrade, which in the PPC world, that seems to be quite a bit.