I too am new to the forum, and to the world of DSLR cameras.....I used a Nikon D5000 before, but came with the 18-55 kit lens, and did not want to purchase and invest before being sure about the brand.
I have recently purchase the exact rig that you are looking at....Canon EOS 60D, 18-200 lens from BestBuy on Saturday - so I have only had really 1-2 days of shooting with it.
I think that for an all round lens, its good - for sure there are many other lenses that would be much better but as a beginner, I wanted to have a lens that I can learn on, and not be limited as far as range etc.
I used my buddy's Nikon with a 18-55 & 55-200 last Monday for my Daughter's grad (before I purchased my camera), abd because of the range (close and far), that I was shooting, I needed to change the lenses at least 5-6 times.
While this is normal, and really not bad (the lenses don't take that long to change), as a beginner, I really wanted to focus on understanding the camera functions, settings and composition, and not worry about the lens that I have on at the moment.
The 18-200 does give me the versatility that I need, but not being the fastest lens, there will be some limitations (distortions etc - there is a review on cameralabs.com). I know that I will probably purchase a more dedicated lenses in the future, but this one gives decent shots, and allows me the time to really learn and enjoy the camera.
I can share some pics that I have taken - but you have to remember that I am not a pro, and really used DSLR's for less than 2 weeks in TOTAL!
To be honest, the shots I took came out well, and there was no really issues with any of them (except of lack of experience on my end)
Hope this helps.
Oh, and I might as well mention, because everyone asks - the difference I found in the Nikon and Canon, and my preference - as a noob:
The Nikon and Canon, really very similar in quality etc - the menu system in the Canon looks more professional, and I like the dedicated buttons. There were some things on the Nikon that I liked - sometimes easier to transverse (CERTAIN menus/settings), but that was it. I went to BB to purchase a D5100 and held the Canon becuase it came with the 18-200, and loved the feel - to be honest I never even read the D60 reviews etc - I have read ALL of the D5100 reviews - because I was settled on that - but the very solid feel of the Canon won me over in the store.
Now that I have used both to some degree, more on the Nikon than the Canon, I prefer the Canon - but as every noob out there with no committment in lenses on either brand, they want to make sure they get the BEST bang for their buck. Really each gives slight differences in their shots and how they handle different lighting conditions - all you need to do is understand what settings to use to get the results you want from the camera you are using and you can almost get identical shots on either platform. My only hesitation that I had going with Canon was that I have an uncle who beleives in Nikon and 3 of my friends use Nikon - so there was an opportunity to learn the camera from them and borrow equipment as I needed - but you cannot get over something that feels right for you.
Good luck, and hope it was helpful.