heheh the 35mm L f1.4 is the only way to get 50mm perspective [normal single eye view] on a crop sensor...
There are the 30mm sigma f1.4 and samyang 35mm f1.4 but each has its caveats and advantages...
since the 35mm L combines the best of AF and optics , there is not much to consider[ other than to pain pain spend one time than to experiment and waste even more $$.]
Some might suggest get a FF body and a economical 50mm f1.4. [ bokeh on 50mm shd be creamier than 30mm due to focal length ]..
But going FF means I'd have to pay for pricier 16-35 and 24-70 [ currently on efs 10-22 and 17-55is], I feel that i am v happy with the 2 efs lens that is very well made for the crop sensors.
That being said, one day when 5Dmk2 drops to about 1.5k, i will still buy........hehhehe
and by then, maybe buy the 50mm L too!