Generally, one appraisal can't offset another one for at least 120 days ... and lots of appraisals are now allowed to use foreclosed, repos, and short-sales, which really impacts the value.
BUT, check the loan costs too -- the VA loans are not such the good bargain it once was, as the points to get the low rate have risen much higher now.
Still a good loan, and "0" down, but the costs are up to get it. The federal Credit unions are as good as anyplace if you have one close. In fact, when we were buying a condo, NFCU was less by over $1000 on loan costs although we didn't close on that condo, and eventually went with a different kind of loan.