What road bike should i get?

You wont be ridding any bike under $1000 as far as you want too or would like too for very long, it wont hold up the way you intend to use a road bike. If you are broke or can only come up with $700 then you need to wait a bit longer so you can get something of a better quality unless you find a better used bike with higher end components than a $700 new bike will have on it. 5, 6, and 7 speed bikes no longer exist new, 8 speed is the minimum now. Any 8 speed road bike you can get for $700 will have the sora group from shimano and it just wont be as likely to hold up with the kind of ridding you want to do. Any bike you get will go only as fast and far as the rider sitting on the seat will or can make it go. The bike by itself can do nothing. A 62mile ride is called a metric century, just short of a century ride, sure you're up for that all at once?....its not a drop in the bucket of a ride. You need to look at a minimum of the Shimano 105 group and this would be a bike I would recommend at the very least: http://www.performancebike.com/bikes/Product_10052... or this one: http://www.performancebike.com/bikes/Product_10052... both of these are still low end bikes, not the worst but low end. Save a bit more and try to get up to at least $900 if you can to get this: http://www.performancebike.com/bikes/CatalogSearch... which will be more practical for those metrics you plan on.

Go REI.com and check out their sale prices, they have several solid bikes around your price range. I wonder if they have a Trek outlet in Austin, that's where they used to (and probably still do) put Lance Armstrong's bikes together.