I have officially figured out how to defeat temptation.

...

By giving in to it.

My tifecta, the PSWii60, is now in place.

That brings my currently connected & playing setup to: Pong (yes... it's hooked up to a 46" LCD... don't ask why), PS2, PS3, Gamecube (though it's one component cable away from the box), Wii, Xbox, Xbox 360

Plus handhelds: PSP, DS, GP2X

Sigh. Nothing left to buy.