I've also been contemplating for a while, as far as I can work out the general consensus seems to be 22mm all round or 22mm front and 25mm rear from a reputable company,
anything wider than 15mm would want bolt on hub,
H&R (ref. 4465670) are highly recommended at approx £300 all in.
I've seen a set of 22mm by others on ebay for £255, or 25mm Aliwhatsits from china for £150.
I'm leaning towards the H&R's myself but not yet hit the buy button.
to help with your search
M14x1.5mm thread
5x114.3 PCD
67mm bore