You can always crop a shot that was composed too lose, but you can't invent pixels (well, you can try...) that aren't in the shot. That said, the Canon 85/1.2L is truly famous for its portrait capabilities, and the Canon 85/1.8 is a great runner-up at a much lower price. Considering that you're married to the crop sensor for a while, you may instead want to try the Canon 50/1.4. You could try a Canon 50/1.8 for sub-$100 to see how 50mm works for you, and then decide which focal length serves you best. Consider renting (the first three are all available at LensRentals.com, one of my favorite ways to drain my wallet)


I will say this: do NOT rent the 85/1.2 unless you are ready to buy it at least two days before your rental is complete, because you'll want to buy it right then and there. I truly hated sending it back when I rented it last April, but have friends who have bought one and we share lenses so I can get my fix when I need it. I was very happy using it on my 1D3 (a "partial crop" body), and enjoy using it on crop bodies too, but can see how a 50mm could be a safer choice for you.