Nikon has better consumer bodies. Canon makes the best 'pro' lenses (other than specialty companies like Leica and Hasselblad) in the world. Based on your current camera choices, you don't seem to need 'pro gear' (which is really a myth, as anything used by a professional can be considered 'pro').
Also, you may want to consider Pentax if you're in to primes. Their FA limited series (31, 43, and 77mm) is usually considered the sharpest, smoothest (in terms of bokeh), most saturated primes on the market. Their new DA* f/2.8 SDM zooms, which will be out later this year, are very impressive. Besides their great glass, the K10D, a prosumer body, has weather and dust sealing, which can only be found in Canon and Nikon's $3000+ 'pro' models. The Pentax DA 18-55 f/3.5-5.6 is certainly better than Canon's kit lens, and comparable to the Nikon kit. Also, the
very reasonably priced DA 16-45 f/4 is much sharper than all three kit 18-55mm lenses. Period.
If you're interested, a Pentax lens roadmap is available
here.
Please feel free to PM me with any Pentax questions. By the way, I don't work for Pentax, I'm just a loyal user and customer.