Interesting, I've had my car a couple of years and was thinking of changing to a R34 Skyline GTT or a Silvia S15 Type R. Plenty of the first around, most are up for slightly more than they are worth but are a darn site cheaper than a GTR.
Scott, it's all very well recommending the supercharger but Altezzas with less then 15 000 miles are few and far between and an engine rebuild isn't high on my list of experiences I want to experience!