I have this exact set up and love it!!
The trigger release ball head is very easy to use and will actually hold my Canon 1D with a 28-300L lens without a hint of movement.
I also use the Manfrotto 685B Monopod and with love that even more. It really helps for sports shots and when you dont need the full support of the 3 legs, but just need a little extra support.
Dont waste your money on the much more expensive Manfrotto Carbon Fiber tripod. I had originally went in thinking that was the one I was going to purchase, but when I held them both side by side, they were only a few ounces difference. For the $200 difference in price, I can work out a bit and carry around a few more LBS