The running costs are of little or no concern to me. It'll be mostly sat on the drive and used occasionally on the w/ends.
I have a Scooby STi sat outside at the moment that I hardly use, but when I do the novelty and thrill never wears off and it brings a big cheesy grin to my face every time. I'd treat a 34 the same way.
I am not a racing driver, and not particularly fast either but it doesn't stop me enjoying the experience!
I fancy a R34GTR to see what all the fuss is about, I thought they'd be cheaper by now and I hear they're pretty good

... I had a modded R33GTS-t some years back, and it was wasn't to my liking at all, I even bought another (Standard!) one to give it the benifit of the doubt, and it was better ... but still not right.
Thanks for the heads up on Parkers, and yes it does seem that I am going to have to fork out 20K+ for the pleasure now, so maybe I'll wait a bit longer! It's a bit on the steep side for what will purely be a "toy" for me.
I, personally,don't like modifications (unless they are releasing factory detunes, or compensating for fuel ratings) on the grounds that ..
a) A car manufacturer having invested billions into the design and manufacture of a car usually know what they are doing, and it's good enough for me.
b) modifying cars is a slippery slope and can normally end up an endless money pit, and no matter what you do, it won't be to someone else's taste. I personally can't stand louds exhausts, raspy filters, garish colours, graphics, and I don't really care what it looks like and don't even notice "subtle" mods so what's the point? A cars individuality doesn't matter a damn to me, I enjoy the experience of driving them, that's all.
Anyways, I am starting to sound like a miserable old b*stard (I am), so I'll stop now and thank people for their time and replies. I'll keep sniffing about, and know full well that you get what you pay for ... but my starting point of using Parkers for a guide price was clearly wrong.