SK, don't listen to these dweebs.
The IBM Space Saving Keyboard is the KING OF KEYBOARDS!
SK, don't listen to this dweeb either, the IBM PC AT 84-key Model F is, and always will be the King of Keyboards
Nothing else compares to buckling springs over capacitive contact key switches. Bag the Model M without the number pad and try the King of Keyboards.
Or, if you're hell bent on getting a keyboard with a small footprint, get yourself a Happy Hacking Professional 2 keyboard. The Topre capacitive key switches don't click, but the typing experience is excellent.
Disclaimer: My collection includes a wide variety of Model Ms but I have not acquired nor typed on a Model M Space Saver. The smaller footprint may provide some advantages related to mousing, etc, but the Model M's buckling springs over membrane key switches feel flat and dull in comparison to the Model F.
PS: Model F keyboards were not assembled using plastic rivets and will never require a "nuts and bolts" mod.
PPS: ripster owns a pristine NIB IBM PC AT 84-key Model F and I bet he would make you a smokin' deal