I have never owned a Razor but I own some vipers and have a PST on order. So I am sure the razor is a great option. Like mentioned above the biggest factor in the choice should be FFP or SFP reticle. I have used both and I am for sure a Second FP shooter / hunter. I do not range with a reticle and do not intend to. I shoot a lot past 700 which is where I would choose to draw the line for reticle ranging. Simply not accurate enough and an easy 10% error in target size will calculate to a 10% error in distance which is 100 yards at 1000.
The reason I like the SFP better is, I in no way wish for my reticle to enlarge with the target size as power is cranked up. I prefer a large target picture and a small reticle for a precise point of aim.... "aim small miss small"
The one thing I would really like to see NightForce and Vortex do, is to have a good look at the IOR MP-8 dot reticle and come up with their own version of a very small floating dot, like the MP-8 dot. This is an awesome reticle and it will allow precise shot placement to long distances with a lower power of magnification. I have shot my 2.5~10 x42 IOR to 1180 yards with very good results. I do not feel this would be an easy task with most other reticles.
Thats my 2 cents.