It is my intention to buy a gti sometime this year,I've always wanted one and it seems that the time has arrived, what with the interest rates on my mortgage dropping as of late

Anyway, the question is, which one ?
I'd like like some reasoned advice on this guys and gals, taking into account things like :- (and not necessarily in this order )
Reliability
Performance
Ease of maintenance
Cost of spares
Economy
I'm a competent diy mechanic, doing all my own servicing and repairs on all my cars, I just have no experience with vw's ( apart from a beetle years ago, my god, I hated that car!)
I might be looking at spending up to a maximum of £2000, probably less, so I'm realistically looking at Mk3, Mkiv.
Is it better to get a late Mk3 with all the probs sorted ( hopefully) or an early Mkiv with maybe some teething troubles?
And what about 8valve v 16 valve? How do they differ regards ease of maintenance/economy/reliability etc?
So many questions........sorry guys...I'll leave it at that for the tme being, and see what response I get.
Thanks everyone