There is no such thing as a good, cheap, wide-angle prime for DX. 24mm is not wide on DX, and 20mm and 16mm primes are bloody expensive.If your budget is limited to ???300, you can forget 2.8 DX zooms too (unless you find a Tamron 17-50 in mint condition for that money, in which case, you should grab it).The best for you might be to get a 18-105VR. At 18mm it is f3.5, and combined with the VR, it