There is one more pro I'd like to add to the N. A. I4 swap. Once you do the
conversion, if you would still like to get a little more power,
"go-fast-goodies" for these engines are VERY plentiful :) The newest one
that comes to mind (at least for the '93 and newer 2.0L's) is a bolt-on
supercharger made by Eaton and Neuspeed. Don't get me wrong, I know the SC
will be pricey, but You will get AT LEAST VR6 performance without the
fittment problems.

When my engine goes, I'm going for the VWoA 2.0L ('93 and newer
Golf/Jetta), then if I still feel the need for more power, I'll go for some
of the readily available mods (maybe even the aforementioned SC). As far as
mechanical inclination goes, I try to do as much work on my own as
possible, but I know that there are a lot of things that are better left to
professionals. I know that my regular mechanic would be much more inclined
to simply ignore the box the engine is wrapped in and treat it like a
Golf/Jetta, as opposed to working on a Subie (he specializes in german
autos).

Sean B.
'90 V'gon, "Happy Bus", soon to be pseudo Wolfy
Torrance, CA
http://vgonman.vwtrek.com