It's wonderful that you completely trust your sons, but this situation is fraught with some possible future difficulties -- how are they going to agree on what to do with the house, should you pass and they are co-owners? Will they both agree to sell and split the proceeds? Will one want to keep it and buy the other out (can they agree on a price)? What influences will their spouses/significant others/children have? If you need to sell, as previously mentioned, will they both agree with you on the sale and the sale terms?
Professional advice is definitely in order -- you don't know what the future holds, how life events, personalities and interests can change and it would be best not to set up a situation that could very easily lead to conflict.
When you set up a trust, remember that the executor ends up with a lot of control and even when they are friendly siblings now, things can change in the light of reality of settling an estate. Of course, even an unscrupulous executor who is not a beneficiary can adversely affect the distribution of an estate.
(Sorry, recent bad experiences relating to estate settlement).