Angel Bocanegra , Dec 09, 2009; 08:41 p.m.
If you go third party lens you might find a f2.8 standard zoom for aps-c less than $700. The "classic" range is 24-70 or 15-xx for aps-c. A 430ex should do fine. If you dont mind primes, then the 50 f1.8 comes to mind, but it might be too tight for aps-c. Ideally, you could get a used ef-s17-55 f2.8 for $750usd plus a 430ex used for around $200.