I didn't read the whole thread, but my 2 cents.
the rb20 is a fun motor, if you wanna build the motor. It isn't the route to go if you wanna just plug and play. I've seen some sick rb20 builds, but they all were built, or re built, from the ground up.
If that is something you are looking to do anyway, then by all means, go for it. Not too many RB cars in the area, so it would have that flair you're looking for...
have fun, and post up the progress.