Since David already has a G5 Mac, if he receives an X1000 he'll be able to give us unbiased comparisons between the two.
And, as he's already paid me for a modified FireGL X3 (which he will receive before I send anyone else one), he'll have an R400 video card on hand as well (in case we ever see support for those).

Frankly, I'm looking forward to hearing about his experiences with the X1000. I'd consider buying one myself if I had the disposable income.