Already did, and it rocks! Aside from the MAME games, the only others I play regularly are UT2003, and Quake 2 on Silicon Graphics (as there are some nice extras - really high resolutions, good transparencies with refraction etc)
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Rory
MkIIa, blue lit buttons, memory upgrade, 1Tb in Subaru Forester STi
MkII, 240Gb in Mark Lord dock
MkII, 80Gb SSD in dock