Your height and draw length are very similar to mine…I’m 6’0 with a 29” draw. I love the longer axle Hoyt bows and don’t think you went wrong with the ultra. My first bow was a Strother Rush XT in a 33” ATA; then went to a Hoyt Carbon Defiant 34; Hoyt RX-4 Ultra; and now the RX-7 Ulta in the same 70-80lb weight. The others were all 60-70lb set around 65. The new RX-7 Ultra feels pretty similar at 70lbs as the others at 65lbs. I think the new cams really smooth out the draw cycle. 80lbs is a stretch currently for continuous reps before fatigue. My only reservation is if you aren’t shooting at 70 or above soon, you’d be better off with the 60-70 setup to be drawing more performance out of your setup…most bows are set to perform best closer to the high end of their draw weight. 65lbs was plenty to bring down elk, pigs, and antelope at distance in my experience too.
I have/currently shoot 300 spine GT Pierce Platinums with 100gr points on all of the Hoyts I’ve used with great results…might consider a 340 spine in this arrow or ask your shop about that as they should be a little more forgiving as you’re getting started. Also, while it’s a bit more expensive on the better arrows, choosing what you plan to regularly shoot will save you from redialing your tape/pins on your sight later. Plus, unless you’re Robinhooding your arrows or losing them, they last a quite a while.