Lovely N16 mate, love the colour, the heavy window tint (straight from the factory I think, a workmate has one that colour with factory tints I can't believe are legal!), the colour-coded bump strips look great on the 3-door and you have the low profile spoiler too (not too keen on the taller two-level one some have). Very fit.
Every time I see a 3-door N16 sport I have a twinge of regret I didn't hold-out till I could find a really low milage one.
Swapping the orange side flashers for white ones would make a huge difference for very few £££s, the orange really gets in the way of the clean colour coded look. Tinting the rear light clusters would be another subtle mod that makes a big difference and debadging the back-end cleans it up nicely. Other than that it looks pretty bloody good stock.
Wheels? The stock ones are pretty well chosen and compliment the car well (way better than the wee 5-spoke ones that came on mine) and wheels are always down to personal choice. Personally I'd go for something pretty similar - the standard brake disks can look a bit weedy behind 18s with a lot of space in them and ott wheels can look out of place on an otherwise stock car but even so I'm a sucker for the
Kei RSS which should fit fine even when the car is dropped.
Speaking of dropping it - there is a members' group-buy going on for Ksport coilovers for both N16 and N15 which should work out about £495 (or £464 if we get 9 orders) for a set of excellent height and coilovers that normally sell for over £600. Steve has the test set fitted and says they are the mutt's nuts. Definately worth getting signed-up for but you'll have to be quick as the group-buy will likely close at the end of June.
And welcome to the forum, mate.