My company is merging one of our sites into another site. At first I was just going to create a 301 redirect from domainA.com to domainB.com but we decided that would be too confusing for customers expecting to see domainA.com so we want to create a page that says something like "We've moved. please visit domainB.com or be redirected after 10 seconds".

My question is, how do I create a redirect that has a delay and will this still pass the same amount of juice that a regular 301 redirect would? I've heard that meta refreshes are considered spammy by Google.