I'm going to say Nightforce, but then I'm a little biased. If you have any questions on one, either 00bullitt or myself both work for the company and would be more than happy to answer any questions you have.
What are you going to be using the rifle for? What caliber? What distances, environment, etc. With a little better idea in mind I could make some sort of recommendation from our product line.
And to note, the NP-R1 is an MOA based reticle, while the TMR is Mil-based. If you're just getting started the MOA may be a little more intuitive, plus the fact that your adjustments would match your reticle. If you wanted a Mil based reticle take a look at the MLR or Mil-Dot with a .1 Mil-Rad adjustment. For the Leupold in particular, I don't know if they offer a TMR with a .1 Mil-Rad adjustment so take a look.