I am not a Marriott elite, so bear that in mind. However, based on everything I've read regarding their elite program, I would not pursue status with them. From my understanding, the requirements to maintain elite status are extremely high, and the benefits are extremely low.
Personally, if I were going to pursue status with any hotel program other than SPG, I would consider Hyatt. That may or may not work for you, but their promos, aspirational properties that can be redeemed without breaking the points-bank, and free full breakfast for all top elites really appeal to me.