I like the combo of 10's on the chest, 15's and a spotter in the pack. The 10's and 15's are my must haves. I'll use the 10's for at least the first hour of the day, then move to the 15's if there is little to no movement, and by lunch I'm in tight checking pockets with the spotter till mid-afternoon. From there, it's a rotation of the 3 till the headlamp is turned on. Everything I run is in the Viper line and I have always been very happy with the performance. You don't need $2,500 glass to be effective out there. Heck, I had a buddy pick up a Barska spotter from Big5 for like $80 on sale that you could see pine needles at 600-700 yards. I was blown away by how solid it was!!! I say pick up whatever you can afford to get the best tools in the bag you can. Hard to do any job without the right tools. Snap-on isn't right for everyone. Harbor Freight gets the job done too when you need it to... Renting as others have mentioned ain't a bad route either.