[QUOTE=dochollidayda;14930970]Canon 16-35L (Landscape) I know everyone is going to suggest a different lens for wide angle, but if you choose sharpness over range, this is the way to go.
Meh....better choices for the money on a crop camera.
I'd go with the 10-22 for wide angle - very sharp across the frame and very resistant to flare...both good qualities for landscape. There are cheaper or faster options out there but for your intended use, the 10-22 can't be beat.
Standard - you said you'd be keeping the 18-55 so just keep using it as your standard lens. If you can upgrade in the future, check out the 15-85. It's a great lens due to flexibility, IS, IQ. Although about on par with the 17-55 for IQ, I feel like 2.8 zooms are wasted on crop for the most part. To get any really nice background seperation you need faster primes and outside of the constant f2.8, the other benefits of the 15-85 outweigh anything the flare prone 17-55 has to offer.
Telephoto - the 100-400 offers a ton of reach and pretty good IQ - this would probably be my choice. Others to consider based on budget/your needs would be the 70-200 2.8 II or f4 IS, 70-300L or Tamron 70-300 VC USD for the budget choice.