Agree with most that the 85mm 1.2 is truly remarkable and so is the 50mm 1.4.
For a sharp affordable walkabout lens, try the EF-S 17-55mm 2.8 (DLSR x0D - xx0D). 'The images/prints produced by the EF-S 17-55mm f/2.8 IS and the primes "pop out" with sharpness and contrast compared at f/2.8 to those produced with the other zoom lenses.'
For more info, visit
http://www.wlcastleman.com/equip/reviews/index.htm Cheers.