I currently own a Raleigh Sport road bike that I bought at the end of May last year. It is the first road bike I have purchased. I did not want to spend a decent chunk of change for a bike whenever I was a beginner. I am now beginning to prepare for a 100 mile race with a friend and I am looking for advice on buying a new bike. I want to spend somewhere in the ballpark of $1200 for a bike. I have a few questions and I'm also open for suggestions.

We have a nearby store that sales Specialized road bikes only. Of course, they think they are the best road bikes you can buy. What are your opinions on that? (I also don't live too far from Houston either, so I can always make that drive for a different type of bike)

I don't know too much, but what about off brand bicycles? Are they just as good for less money?

What are some good websites to check out to buy a bike?

Thanks for any help and suggestions!