Finally got chance to get my new wheels fitted. I know they wont be to everyone's taste as, due to the design not having the spokes going all the way to the edge, although they are 17's they appear smaller. It's also not the greatest picture - the angle seems to make them look smaller than they appear in real life.
However, they do fulfill the purpose I had in mind and are noticeably lighter than stock - I weighed the new wheels at 7kg using some bathroom scales. I'm not 100% convinced by their accuracy but I will weigh a stock wheel with them and it should at least give an accurate difference in weight even if the actual weights may be a little off.