Why do you want to upgrade your parts? - I'm guessing performance rather than looks, right?
What is it you don't like about your bike at the mo?
I wouldn't drop too much on a plug that you can't take with you.
In terms of upgrades, nice wheels make a difference - but that's a chunk of money. Everything after that just makes minor inprovements. Prolly not worth it if is already comfy.
What tyres are you running? - might be worth upgrading those before wheels.
Why do you want to upgrade your parts? - I'm guessing performance rather than looks, right?
What is it you don't like about your bike at the mo?
I wouldn't drop too much on a plug that you can't take with you.
In terms of upgrades, nice wheels make a difference - but that's a chunk of money. Everything after that just makes minor inprovements. Prolly not worth it if is already comfy.
What tyres are you running? - might be worth upgrading those before wheels.