On a road bike you can get the bar tops exactly as high as they are on you 7500. I am debating putting drop bars on my 7100 to make it a more pure cyclocross bike. Honestly the things i would gain on a road bike are this:1. more hand positions as my hands go numb after 10 miles or so. 2. lighter weight. 3 less wind resistance.

the things i would give up are: 1. toughness. 2. the ability to ride off road if i wanted to.3. a small amount of comfort.

So I am trying to make the same decision as you are.LOL