Philip Wilson , Oct 09, 2011; 11:49 a.m.
You should post this on the EOS forum. In answer to your question you may well find that the 18-135 is too slow. On the 60D you should be able to use ISO 1600 (and ISO 3200 with care) - in either case shoot RAW. The 18-135 is F3.5-f5.6 and mainly F5.6. A lens like the 85 f1.8 will give you 3.5 stops improvement (i.e. shooting at 1/1000 vs 1/90)