In Maryland you want tenants by the entirety. Actually, it's presumed to be that way for married people even if you don't explicitly write it in that state. But it never hurts to be precise.
As for whether you should or not. You are converting a separate property to marital property. Frankly, except for certain "been in the family for generations" type things, my philosophy is that if it's a marriage, it's a marriage and attempting to maintain separate property is sort of predisposing you to not considering the whole concept seriously.
If you however, want to keep it as separate property and let it transfer to you on death while being revocable in case of divorce, then you should use a will or a revocable (i.e. living) trust. As fair says, a lawyer is probably a good option if you're going to go that route.