RE: Most common draw weight?
I totally agree. My bow has 70 lbs limbs which I can tweek to get about 73 lbs. I shoot this bow at a comfortable 68 lbs.
It's expensive to simply change limbs and at times, is more benificial to go to a new bow depending on your particular bow.
There are also tweeks you can do to get a couple more pounds out of a setup like twisting cables....decide what's best for you but pending your KE etc...your bow is more than adequate as is.