Hey people,
im still fairly new here (introduced a few months back) but hope to start posting more and looking around a lot.
ive finally got my act together and buying myself a camera kit.

getting a 60D, im after a big lens for it and been scouring information and reviews, but interested if people here have opinions.

The choices...

Canon 100-400 4.5-5.6 L IS USM $1700
Sigma 120-400 4.5-5.6 OS APO HSM $900
Canon 300 4 L IS USM $1300
Sigma 100-300 APO HSM $1100

I will be using this a lot for motorcycle photography, then just other stuff.
Distance isnt a big thing, i dont need any more than 400mm, ive been shooting with a 200mm (not using full frames here). and thats just enough, so i think 300mm-400mm should be fine.

The two Canons are my front runners.
I love the F4 on the Canon 300mm, and since its a prime L, id suspect its sharper than the 100-400 at 300mm? maybe wrong? also the primeness of it could give me the shits over time.

I want it fast (dreaming of a Canon 400 2.8) but i dont have a lot of money (sorta 2k max)

Final thought, is the rumor of a new model Canon 100-400 going to come true in the next few months? cause im not in a hurry.

Rest of my kit so far is consisting of...
Canon 60d
Lowepro flipside bag
Manfrotto 190CXPRO3 tripod
Sigma 30mm 1.4
Sigma 10-20mm 3.5