I use the apple aluminum (wired) with numpad on the MP.
Many hate them for the lack of "haptics" or tactile feedback, but I honestly do not mind. For me, key spacing is more important - every time I use an unfamiliar keyboard (spacing and positioning), it takes me half an hour to get any meaningful typing done, and 2-5 days before I'm really rocking (which for someone who has as slow fingers as me is not that much to talk about).
The only keyboard I've ever really hated was the translucent plastic keyboard apple had before going Alu. That thing had an ability to get stuck - if the force stricking the key was not sufficiently aligned with the optimal movement of the key, it would not budge (had a wireless and a wired version, so it was not a specific device)
P.S. I hardly ever look at the keyboard, except when I'm using an iPad (such as right now). The iPad's a pain as I use multiple input languages with different layouts, and I have to stare at the keymap all the time (I'd love to have the ability to select a keyboard map which displays all the keys I need (mostly uk+umlauts), but be able to swap dictionary (not keymap)...
RGDS,