Wow, snap with the bluebird... I had a series 2 wagon before my stagea, although I only had mine for about 8 years. I second the longevity of the bluebird, it takes a hell of a beating and keeps going (I did a twin SU carby + extractors conversion and it was going better when I finished with it then it was when I got it ) but I was in the same boat, I just didn't have time to keep fixing it, and I was getting jack of how much money I was putting into it.
Go the stagea, it's one hell of a trade up