I play with BLX Blade 98 and have use both these stings @ 56lbs. I probably like RPM Blast a bit more over Black Code just because I was serving better with it and keeping more balls in. Though when I had RPM Blast on my backup racquets had NRG2 and Tourbite. So I have not got a chance to compare the two side by side. I am planning to buy a reel and would appreciate your suggestion on which way to go.