I've always had good luck with Whitetail Institute products. They might cost more, but I planted some of their seed last year side by side with generics and the deer preferred the WI products (the deer ate them first and they grew larger). I buy some generic seed from Welter's or a local seed store if it's a larger plot, but if I have a last minute opening for a plot I have no problem with buying a bag of WI or Biologic seed from the store. Time and gas is expensive, so for me it's just not worth driving all over the countryside if my goal is to throw in a last second 1/4 acre plot.
There are other options that the deer might prefer more than rye grass, but a small amount in a blend isn't a problem. This spring I had a leftover bag of Biologic that contained alfalfa and some ryegrass and the deer are browsing both daily. And this tiny strip is only 50 yards from some buckwheat and soybeans, so the deer have other options but they're still eating the rye grass. I think they rye grass component is just filler that is sure to grow even with poor weather or soil conditions, but the deer still eat it. I'd say go forward with your WI blend and let us know how it grows. Or better yet, plant the WI blend in one section and some generics in the other just to have a direct comparison of different blends.
