Since playing 18x20 Prestige MP and now Yonex Vcore Pro HD:
Rpm Blast 1.25 @54lbs for 10 years.
Then ALU 1.25 @48lbs for a few years.
Now I'm experimenting with hybrid variations of Rpm Blast, Rpm Rough, and Rpm Power, different tensions on crosses and mains ~48-53lbs.
Really liking Blast 48...