Ive looked at it.
Jarrod are you Canon or nikon?
The reason I ask is if Canon, you have 4 70-200s to choose from.
70-200 F4 L ($700.00)ish
70-200 F4 L IS ($1,300)ish
70-200 F2.8 ($1,300)ish
70-200 F2.8 IS (2,000)ish
Up here the Sig sells for $1,000.00
The two 70-200 F4s are rated as among Canons sharpest and best lenses. The two F2.8s are no sluoches either. The Sigma may be very good ( I dont know) but I dont tihnk it will be on par with any of the Ls.
If you dont have to have f2.8 you can save some money and get the F4, or spend a bit more and get either the F4 IS, or f2.8 non IS.