Hi MMD,
Well done with the lathe, first buys should be for your protection, something for the eyes and especially something for the lungs.
The Nova chuck is fine but don't overlook Axminster own range, they are very good and the choice of add-on jaws seems to be never ending. I have these on the teaching lathes and they always give good value.
The other chucks I use are from Vicmarc, again a very good chuck.
A grinder should be high on the list of priorities, a cheap grinder with good wheels is better than an expensive grinder with poor wheels. There is also a thread going on somewhere else on UK Workshop about using a Tormek for woodturning.
To go with the grinder, a jig is a must. Sharpening by hand works but unless you've been doing it for years you'll end up with different angles at every visit to the grinder and waste a lot of expensive steel. I have on test lots of jigs, my current preference is for the TruGrind from Proforme. This is a single jig that covers almost every woodturning tool you'll need to sharpen, it's not cheap but it is simple and easy to use.
Hope this helps.
Regards....Mike