You have a problem. Your draw length is pretty short, but you could get the 82nd which has an IBO of 350 fps. You loose 15 fps/ inch of draw that you go down from 30" which is what IBO is measured at. If you are feeling strong you can get the 80lb limb option. I was wrong about this. I called Bowtech about an 80# limb option and the Guardian was the only one that that they will make 80# limbs for. Each pound you add to your draw weight, you gain 2 fps. You can also get it super tuned by your pro shop if they know what to do. That will add speed and make it shoot smoother. You might walk out of there 10-20 fps faster after a super tune, depending on the bow and the quality of tuning. I know that the PSE X-Force (350 fps IBO) can be super tuned to 370+. If you went with that rout, you would be shooting 310 fps- 320 fps at 70# and a 27.5" DL. I don't know what a super tune would do to the 82nd, but I am about to find out because I am going to call terminal velocity archery tomorrow.