Arizona is a Community Property state. We offer "Community Property with Right of Survivorship" (CPWROS). Compared to Sole and Separate or Joint Tenants, the tax benefit of CPWROS is you will get a full step-up in basis upon the death of the first spouse to pass. (For example: Have tax basis in property at time of death of $140,000; fair market value is $200,000; if not CPWROS the remaining spouse only gets a step-up to $170,000 (half of difference), but with CPWROS the new basis would be $200,000, thereby reducing the eventual taxable amount by $30,000 in this example.--Of course, this only really becomes important if you exceed the current exemption of $250,000 for a single person.)
There is also a legal benefit to CPWROS vs. Joint Tenancy, making it impossible for one spouse to transfer ownership without the other spouse's approval, but I will leave that to an attorney.