I bought my first bike three weeks ago, a Trek 7000 (my wife bought one too). Very entry level, yes. I have been riding mostly bike paths, but some roads as well. Over the course of these three weeks, I've put about 70 miles on the bike. I expect to ride somewhere between 100 and 150, maybe even 200 miles a month in the future.

When I was at the bike store, I also tried a Trek 7.2 fx which to me, handled better and felt more solid than the 7000. With the amount of miles I plan to be putting on the bike (I'm guessing it's not really that much), is there any reason to upgrade or should I stick with what I bought? I would probably be trying out the 7.2 fx and 7.3 fx. Or should I wait a year / year and a half and buy a decent road bike for ~$1000 or so?

If I'm not mistaken, there is a 30 day return policy at the LBS I bought the 7000 so upgrading shouldn't be much of an issue.

Thanks for the help in advance!