28mm f/1.4: $2399 CDN
70-200mm f/2.8: $2219 CDN
105mm f/2.8: $929 CDN
35mm f/2.0: $419 CDN
Go for the great glass.
Though the 35mm and 105mm aren’t quite in that category.
But. But.
Then again – they don’t cost as much as 4 months of rent, textbooks and a few ancillary expenses either.