the rallye's are a bit slow as standard, can't remember what the 0-60 times are but they are not great. i used to have a mk1 golf cab with a g60 and at over 200bhp it was very rapid! i gave it some real shit (used to spit flames from the exhaust, oh and i dusted my mate in his 225 tt up to about 100!) and never had a problem with it. if you keep the charger serviced you shouldn't have a problem as thats the only weak part really. The charger howl was great too! 5.5k seems alot for that car with the mileage though, you can pay less than that, i would have a look on edition38 forum if you've not already. The 1.8t from an audi tt is a popular conversion too...

hope you get a nice one, not that long ago i was looking for one but decided to get something newer instead.