The reason that some people recommend getting a more affordable bike at first is so that you can get some miles under your belt and figure out what you want in a bike without putting down a whole lot of money up front. But everyone is different, and if you can afford a really nice bike that fits your body and your riding habits, then by all means, go for it. Good quality does make a difference.

You can get very good quality used bikes, but new riders may not know what to look for in a new bike.

Just remember, if you don't like your bike, you can always sell it and get another one once you get some more experience.