My pennies worth: (for the B747)
Rollers are not reliable enough, and are way to heavy, and fuel efficiency is a problem.
P&W are much more of a 'hardier' machine, but are not very powerful, and not very fuel efficient, by comparison.
GE seem to make a good allround machine, light weight, fuel efficient, and able to stand the occasional bird down the intake.
They just seem to last for a long time. (MTBF)
And, of course, they don't use EPR for output indication.
For me, the best choice, all round!
Cheers