If you can only have one,i'd say the P3D is the most versatile, and therefore the most practical.If for some reason you NEED (or just want) big-time throw,i'd go with the T1 because,while a little less powerful than the MRV, it's still quite a little powerhouse, it's way cheaper, and i've read more QC complaints about LumaPower than i have about Fenix.