Dolan Pre Cursa / PreCursa / Track Champion

Is the precursa safe for us 'broad-shouldered' people? I'm just under 90kg and I'm thinking of getting one.

Also, I'm 6'1 and riding a large Charge Plug that I find too small for me, showing a fair bit of seatpost with the saddle rails as far back as they can go and a 120mm stem. I was thinking a 58 possibly?

Im 6'2 with 100 kg and 58cm precursa was just perfect for me.