Also remember older 4100 keyboards have no windows key which is essential for OS X, but not so essential for windows but still annoying not to have. And consider the 4400 keyboard too as its a more standard european layout keyboard.
However they are nice to type on and I own a non-windows key one, nice to type on abit cramped but then it is a compact keyboard for a reason. I still don't understand why manufacturers continue to leave in print screen scroll lock and pause buttons and make better use of the keyboard and map these keys with the FN key for the few people that use these keys, it would make for a much more cleaner layout.
Also I prefer how pageup, page down home and end keys combined with the cursor keys would link up as well how it does with my macbook and my old hp space saver keyboard. In the end compact keyboards are always a compromise, but the 4100 is a very nice compromise between cost, reliability, size and key action/feel