Looking for some domain name advice

[TyyWard]

I am looking for some advice regarding domain names and SEO. I am currently building a site for a local futon and furniture store. We recently purchased the domain names legacyfuton DOT com and legacyfutonandfurniture DOT com. My question for all you who are SEO savy out there, is what name would you use to host this site on?

I was thinking of hosting this site on the legacyfutonandfurniture DOT com for SEO purposes and then using the legacyfuton DOT com as the domain name used for marketing purposes (because of how short it is and easy to remember) and redirecting it to the longer name . This stores main focus is Futons, but he carries a lot of other things like beds, dinning sets, bean bags, curios, etc... The name of the store is Redden's Legacy Futon and Furniture Gallery, thus where we came up with the domain names. I would greatly appreciate any advice or direction you can give me on this. What are the pros and cons of my thinking on this.

Thanks for your help with this.