[mythtv-users] Which Hardware to use from these choices?

[mark]

A little off topic yes, opinions appreciated on this. Trying to decide 
which spare box to use.....

I am going to build another Myth Backend/frontend box.  ( It will also 
be a general purpose box surfing / email etc )
I have 2 boxes here to choose from and want to know which would be best 
suited power-wise.

A dual p3-800 ( 512 RAM )
Single Intel celeron 1.8 ( 512 RAM )

Would the dual 800 be that much slower?  Would it run MythTV fine?  w/ 
PVR250 card / Nvidia 5200 TVout?

Thank you for the input.

Mark