Salary wise
A+ = 4500+
A = 4200 - 4500
A- = 3900- 4200
B+ = 3600-3900
B = 3300-3600
B- = 2900-3300
And to OP as well...
Don't just solely use this too though... Bob Cody, the ATG, was a A- according to the guy who drafted him, whom is in my league. He was actually the guy's 2nd choice, behind an A+ he'd found, but he got lucky in that it fell to the A-
If they are both 5/5 kinda guys... Puts you in a tough spot.