Personally, I've never understood the appeal of the Realforce 'boards. To me, the best available keyboard is the HHKB Pro 2. This is, primarily, due to the layout. The key feel is nice, but it doesn't compare, IMHO, to either the blue or brown Cherry keyswitches. (in HHKB Pro's case, the key feel is "good enough" and the layout is perfect...which is why this keyboard wins top spot with me)
If I want to type on a "standard" US layout keyboard, I'll take a Filco with Cherrys any day (or a buckling spring 'board).