My recommendation would be a pool pilot with the RC-42 cell or R-52 cell or a Hayward/Goldline Auqarite with a T-15 cell. Both are proven, dependable units from majro companies with good track records. Personally I would stay away from the Zodiac units (which include Jandy since they are owned by Zodiac).
Pentair units have had problems in the past but my understanding is that they have solved their problems. I have no direct experience with them. WaterMaid units are also worth looking into. They are an Austrailian company but do have US distribution channels.

Just my 2 cents.