Well then just do a repair/upgrade install. That will keep your apps, data and most of your settings, and while you're at it, might be a good idea to upgrade to the RTM build. (Yes, it can be done, see:
Engineering Windows 7 : Delivering a quality upgrade experience).
An upgrade install to the RTM build worked great for me. The standard clean install advice, is, imo, a bit outdated. Yes, a clean install is always arguably the best or better,
but Windows 7 is much better at doing upgrade installs than any of the previous incarnations of Windows. I would give it a try. You just might be delighted with the results, as I was (after a few minor tweaks and adjustments that took less than 30 minutes). Worst case, you're not satisfied with the results and still have the option to clean install anyway.