Does this information help?
What I have now:
Freewheel: SRAM PG-950, 9 speed, 11-34
Crankset: Shimano FC-M442, Octalink BB, 44/32/22

Giant TCX
cassette SRAM PG 950, 11-26T, 9SPD
cranks FSA Tempo, compact 34/50T

I read so many different opinions about having a double instead or triple. Some say it is much harder for hills, others say its just a matter of training.