Once you've fallen in love with a particular home, it's hard to go back. To avoid the temptation to get in over your head financially, or the disappointment of feeling like you're settling for less than you deserve, it's best to only look at homes in your price range. Start your search at the low end of your price range - if what you find there satisfies you, there's no need to go higher.
Remember, when you buy another $10,000 worth of house, you're not just paying an extra $10,000 - you're paying an extra $10,000 plus interest, which might come out to double that amount or more over the life of your loan. You may be better off putting that money toward another purpose. (For further reading, check out Buying a House in a Down Market.)