Well . . . . depends on who you ask. Like anything, some folks favor the Code3 or the LET 181/185, or the ASP 178.
Code3 has had some quality issues and apparently their customer service is basically nonexistant.
I went with the ASP 178 before the Code3 was out. Would I still go with the 178 today? Yes.
IMO the 178 has the best track record for proven results and reliability (note I said IMO, as some will feel completely different).
In the end, do what you want to do. Just do a bit of research and see which is a better fit for what you desire.