...and Canon has the best lens lineup available, so...
See, this is the kind of nonsense I was mentioning a few posts back. How is Canon's lens lineup "best"? Leica users would laugh at you. What if I want small, stabilized primes - what's Canon's offerings there? Are there reasonably priced weather-resistant zooms available? You could say that Canon has the largest lens lineup, and maybe the most complete lens lineup, and I think that would be a justifiable position. But "best"? No, that's subjective.
Best is definitely subjective- and Leica users laugh at a lot of people, who in turn laugh right back. "How's that M240 at your kids football game, huh?" etc. For the price one would pay for a fleshed out Leica system, a very complete, very very high quality Canon (or Nikon/Sony to a lesser extent) system could be assembled.
Also, Canon is on a roll making small, stabilized primes. Nikon is just getting around to putting SWM motors in their lenses, and Canon is putting out even sharper lenses with IS and USM. The 24/2.8 IS USM in my sig below is among them.
And for 'reasonably-priced weather-resistant zooms', I assume that you're referring to the kit Pentax zooms, for which no one has an equivalent. Of course, the Pentax zooms pale optically to the Canikon kit zooms, and Canikon put out ~f/4 professional zooms that would humiliate Pentax's range.
So yeah, I stand by saying 'best'. Best optically, best AF, best IS, best selection- it's all there.
(and I'd just as happily shoot Nikon, and damn near went Sony...)