Here's my thoughts:
- Buying eBay kit might not always be the best option, because of fitment and quality.
- Depending on where you go, a bodykit sprayed and fitted will cost you anywhere between $1000-2000
- Respraying your whole car can cost from anywhere between $2500-$10000 pending on quality of the job.
- A stock spoiler is worth about $100-200. Spraying and fitting a spoiler is probably around $200, thats if you don't buy a stock silver spoiler.
- As for bodykit for your car, it shouldn't have any problems with height, as it seems pretty high off the ground at the moment.
Here's what I'd do if I was in your shoe...
Instead of buying a cheap Nismo "style" kit off ebay, and spending like $2000 to get it on the car, then spend extra few hundred to get your spoiler. I'd spend that $2500 for a BETTER R34 that's got all the options you want. That way, everything is from factory and you will realise that factory plastic kits fits 100%, oppose to eBay fibreglass kits might not be a perfect fit at all.
That way, you might even have money left over from that extra $2500.
As for a full respray... What colour are you thinking to get? If it's something factory, then obviously be patient and wait for a colour that you want along with all the other options you wanted. Or if the colour isn't a factory colour, then consider if it's worth spraying or not. Because with the money you spend on respraying, there are ALOT of things you can do to your car with that