In terms of build quality, the realforce is hard to match. You would have to find something else that is produced in small quantities, where the QC is exceptionally high. After all, the Realforce is basically a boutique item, with all of the attention to the production that usually implies. To bring in the dreaded car anology, what do you think will be more well built, an S class mercedes or a Rolls Royce? Sure, you're definitely paying for that quality upgrade, and is it even worth it, I dunno, but it's definitely there.
In terms of key feel...well, that's entirely personal, though I definitely prefer the topre to anything cherry.
Out of curiosity, what do you have now? And do you want something similar, or are you looking for something new?