Congratulations! Where do you need more room? More entertainment space, more Bedrooms, Bathrooms, Car Space (if you have kids of that age), or yard space.
Do you want to stay in your area, school district, the same distance from work as it is now?
How patient of a buyer/seller are you? There are buys on homes needing TLC out there, but you have to wade through the ones on the edge, before you get to the right house.
My website has complete access to the MLS at no charge to you. You can also look up HUD repos if that is of interest to you. This site, Trulia and Realtor.com also have most of the MLS on them as well.
Please feel free to contact me if you have questions about your options.
Good luck in your hunt.