Wow, I'm pleasantly surprised at how constructive and helpful this thread has turned out

. Thanks for the replies.
Last night I tentatively broached the subject of selling 'the Golf' with wifey. It seems that she's more attached to it than I feared...she even started crying, saying that she had to scrap her first car for it and it's our first car together, etc. So it seems that it is after all possible to develop an emotional attachment to a Golf.
Regarding the potential solution to my query, I should clarify that I'm aiming to steer clear of Japanese rice-mobiles. No offence and thanks for any such suggestions anyway. I'm sure they're great fun cars but I'd be concerned about finding one that hadn't been tastelessly modified or run into the ground, as well as the fact that they're just not really me.
Old Jags and Astons with lots of miles are an interesting idea...obviously the comfort would be there.
Looking at the MX5 - it seems a bit underpowered in the Mk3 at 160 bhp? I know it's a small car but I'd prefer a real rocket ship with a sub 6 second 0-60 and more than four cylinders.
Running costs aren't a huge factor really, though obviously I will try and avoid a car that will cost thousands p.a. just to keep on the road.
I think top contenders at the moment are: Elise S2, or if the above is too harsh and raw for my tastes, 350z or Z4 for the blend of practicality and fun.
I like the look of this 350z (yes, I know it's grey again

):
http://www.pistonheads.com/sales/1321535.htm.