I am getting up there in years and would like to start intergrating al little bit of cycling in my training. I run about 50 miles a week back and would like to incorporate two days a week of fast and hilly 30 minute rides back and forth from work, along with a once a month 2 to 3 hour ride. I live in the NOrth where there is snow and most of my riding will be on cement or paved trails. Which kind of bike should I get, would like to spend under $1,200.