I've got the temptation to add both of them to my bag. I've got the funds, I just need to take the plunge.

I do own the Sigma 70-200mm f2.8 and use a borrowed Canon 70-200mm f2.8 IS but I really like the idea of a smaller lighter fixed 200mm. Am I being unrealistic and stupid??

The 135mm is basically a replacement for my 85mm f1.8 once I go full frame by the end of this year. The 85mm is my favourite focal lenght on a crop camera. Is it as good if not better than the 85mm?? Any alternatives??

I'm getting both of these for a good price second hand in mint condition. The 135mm has 7 months warranty left.

I've always wanted a kit that were made up of primes (35,50,85,135,200). This would complete my set and so I'm tempted.