Ah, one more lens you should consider if you decide against going with the kit lens: the Sigma 17-70 f/2.8-4.5 DC Macro. Apparently it's capable of focusing on subjects that are right up next to the lens! Here's a good thread on it:
https://photography-on-the.net/forum/showthread.php?t=186589
Some people there seem to think it's even sharper than the Sigma 24-70 f/2.8. It's not f/2.8 from end to end but it reportedly has excellent image quality.

