Will switching domain affect anything? SEO?

Hey guys - I have a 1 month old site that is fully online and connected to a domain that I own through godaddy. However, a domain that I have always wanted has just became available and I would like to switch the site over.

My question is what will be affected if I do this? My main concern is the SEO as I have spent a ton of time going through all the pages on the WIX SEO helper and definitley would not want this affected.

Any guidance would be appreciated.

Hey Jeremy,

Why not just add the domain instead of switching them out?