I toyed with the idea of getting a 748 and getting one of Nelly's 853 kits on it.
About 2 grand all in, fitted, tested etc...
That was a couple of years back mind, but the thought of a cheapish 748 which you could pick up for about £3.5 K back then with effectively a new refurbished engine for £5.5K all in was quite appealing.
[Edited on 30-3-2005 by Jools]