Hi
I would say if your dad and friend can guide you there is no reason to buy new from a shop. In your price range NO question. For instance, I helped my dad buy a used Scott CR1 for $1100 on ebay. Nearly new! He saved $1000 and then bought accessories, clothing, shoes, and pedals from a good local shop who then gave him a tune-up and decent fitting for free. Ideal. Be a little patient and something like that might come down the pike.