I was seriously thinking about putting in an RB26....but for the price I just cant justify it.
If you want to be different, or have a cool engine, or just cant bear putting a non nissan engine in, than the RB26 could be for you, but Im not worried about any of the above...so Ive taken the RB26 from the 'possible engines' list.
I think Ill spend my money (and less of it at that) on another engine and still neck snapping power...