I can't comment on what the VK is like to own since I've never owned one but I'm sure like all cars if they run smoothly, start first time and get you where you want as quick as possible it should be just fine.
What did you end up with, the carby or fuel injected version engine?
Look in the FAQ for some of the basic modifications, keep in mind though you may have troubles with insurance, if you do anything outside of the maunfacturer specifications as I have found out and I'm sure I'm not alone. Best thing to do is ring the insurance company and ask them what implications extractors, exhaust etc may have, as these kind of mods could very well void any warranty with your insurance company.
Information on doing up your car really comes down to how much you want to spend, heck I could think of a 100 hundred things I want to do to mine but money is a big factor.
One piece of advice I will give you or anyone else looking at doing this kind of thing is make sure you have enough cash just in case something goes wrong. It may seem obvious to some but others just don't think about that side of things.