stick with the mk2 I would say. I havent had one before but I have test driven one and well let's just say I'm going to ditch modern and refined for raw and responsive.
I have a 2003 1.2 ibiza. (I know it's not a luxury top spec golf but it's still a modern hatchback) Which to be fair although slow, is still very refined and quiet. The steering is electric and very very light. Long drives are pretty easy in it. It's got air con, electric windows, remote central locking, cd player and all that malark which aint bad at all on a base model Seat.
But essentially it'll be like trading in the fun of motoring for the chore of motoring. Hence why I'm looking to get myself a valver. Yeah a newer car would be a lot more comfortable but you dont really ever feel "in control" of the car as such. You dont feel hardly any of the road combined with the light steering means any desire for spirited turn ins on fast corners are quickly disappated as you simply dont know how the car will react as you are in some ways numb to it all.
A modern car will take you from A to B in relative comfort but with all modern cars looking more and more the same nowadays I find the angular square like mk2 golfs the most alternative not to mention coolest looking vehicles on the road. Also new cars are a lot fatter than older cars, and if you want performance then you'll have to shell out a lot more cash for a similar driving experience. My car handles like a boat and even though classed as a "supermini" it weighs a lot more than a golf! Think about it man, it's up to you, I'm sure you'll make the right choice.

Regards,
Richie Lee