So currently I have wild country friends in .5,1,2,3. Now, I have a 20 dollar coupon with REI, which I could use on another cam to bring that price down to about 40 bucks. Also with all the sales online, I can get .5,1.5,2.5 for 140$. I need help deciding!. Should I get another cam from REI and get the 3 friend set? What sizes would be best to double on if necessary? Or should I use the coupon for a new stove?