Brittman,
I shoot a Black Widow 52lbs @28" draw, my draw length is closer to 27.75" as well. I shoot the CE Heritage 150s cut to 28.5", 50grain inserts, and 125 grain heads. I also have a Black Widow Wrap AND a Black Widow Clear Protetive wrap with 3-5" Shield Feathers. My arrows weigh 535 Grains and fly spot on. I think you would be fine with a similar configuration. However, I will say that like me you're right on the bubble of being "in-between" shaft sizes. I can't shorten my shafts up any more, nore can I remove the wraps, and if I add weight to the nock end or remove weight from the front-end my F.O.C. gets lower than I desire. To go up to the 250s adds more weight and length than I want out of 51-52lbs. Lots of details to consider that fall in line with "preference". Either shaft will work, but the arrow dynamics will be different with each. If you wanted to stick with Carbon Express Heritage, which I prefer, I'd go with something similar to my set-up (150s). If you feel you need stiffer, I'd probably pursue Gold-Tips because they are lighter weight for a similar spine... You can never go wrong by purchasing one tuning shaft of each and going through the bareshaft tuning exercise to dial in a specific arrow set-up, THEN purchase your full dozen shafts and components with confidence.