Unless you're into racing or impressing people who wear lycra, go get something that feels comfortable and doesn't cost the world for when you decide to stop riding it.
Made that mistake when I bought $600 rollerblades 5 years ago after listening to pros tell me what to buy. Everytime I actually use them, it brings the average cost per use down, which makes me feel better about buying them. I'm down to $100 per use.