The old keyboard still works (and I have a backup for it, too, that I bought inexpensively off eBay last year!). I just like the ability of this other one where you can spread it out so much. In fact, I have BOTH of them hooked up at the same time right now since I can't make up my mind. Guess I just want to combine the two of them into one!!
A good chair can make such a difference, but boy can they be expensive! Armrests are nice, but I usually take mine off, too, because I can't type with them on even if they're adjustable! At one time, this company that makes the keyboards I have actually had a setup where you could attached each side of a split keyboard to the arms of a chair they also sold. It was rather expensive and they don't sell it any longer.