BY far the best computer i ever had. I remember having this computer way afer the PowerPC era (i think it was 2009), and still kicking some asses all the way. Good investment and i hope the graphical issues is not happeningf because of a dying graphics card ...
I've still got mine (well the kids have) it's had ten years of abuse - it's been dropped down the stairs - bent out of shape and bent back into shape, lost a couple of keys etc etc It still works. I suspect after the armageddon a couple of cockroaches will find it - fire it up and find it's still working.
As you say the best machine they made. (And I've had a few!)