I just bought my Trek 1000 WSD in February and so far I am very happy with it. Of course, I don't really have anything to compare it with as this is my first road bike! But I give it a big thumbs up! I really have no complaints and I feel like it's performing quite well. I only have about 250 miles on it but so far, so good. I'm 5'6" and got the 51 frame...the fit seems to be good based on the fact that I'm not having any specific aches or pains.

The only change I've made is switching out the saddle. I didn't hate the stock seat but I wanted to try something else (I've ended up trying two different something elses!). Interestingly, my new Terry Butterfly saddle is very similar in dimensions to the stock Bontrager seat. (My new Terry Liberator X saddle is NOT similar in dimensions and I'll be selling that soon on ebay if anyone is interested!)

I test-rode a couple of Specialized bikes and I liked them a lot too. For me it came down to price (my Trek was on sale cuz it's a 2006) and the feel of the Trek. It just felt better and more comfortable to me. Plus I couldn't resist the pretty blue color of the Trek!

My friend rides a Trek Pilot 5.2 - full carbon with Ultegra components. He looked over my 1000 and even rode it around a little bit and said he was impressed with it for an entry level bike. I think Trek gives you a lot for your money even on the lower end bikes.

Good luck with your decision!