Haha, I knew it was going to be good when I saw the title...
You splashed out for the 7D? I'd have sold bits and pieces and gone for a 5D...
Maybe the 50D and the Canon EF 28-135mm F3.5-5.6 IS USM...
Wow, and the Canon EF 24-105mm L?! You really did splash out! Are you going to get rid of the 28-135?
Would be interesting to compare the Tamron 10-24 with my Sigma 10-20
And the 17-50 VC vs Non-VC
Get some tripod set-up comparison shots going, I've always found the comparisons on the net lack a something, if you've not taken the picture it's missing your own personal variable