I don't run 1x11 but I run 1x10 with 32t chain ring and 11-36t cassette. I get on fine with this and it's so much better than my old 3x9 setup but sometimes I feel like I could do with an expander cog on my cassette. If I were going to get a 1x11 I would go for an 11-42 cassette and a 34t chain ring. Chappy that sounds like a good setup but I would probs go for a kmc or SRAM chain!
I'm not that familiar with Hope's new cassette, but their website says the 11-speed 10-40 and 10-44 cassette uses a "unique freehub" that works with Hope Pro 4 and Pro 2 EVO hubs. That sure sounds proprietary to me. I don't get why anyone would want to go that route, but hey whatever floats your boat I guess ¯\_(ツ)_/¯
edit: @chappy08 do you already have a rear wheel with a Hope freehub?
I think you will see a big difference in weight by losing two chainrings and the front shifter when going from 3x9 to a 1x drivetrain. I know you said you were considering 11-42 in the back, but Shimano's releasing a new, 11-46 cassette this summer, and OneUp just released a 50-tooth extender to convert Shimano's 11-42. If you're worried about losing range, the 11-42 converted to 11-50 or 11-46 would be great choices.
Currently running 2x10 sram x9, whole drivtrain is battered now so time for full upgrade. I think I'll get the kmc chain, only heard good things!
How fit woukd you suggest I would need to be for 10-42 with a 32tooth?
That would b fine, wouldn't need to b all that fit for that! As I said in a previous post, I'm running a 32t ring with 11-36t cassette. So if I get away with that you'll have absolutely no problem using a 32t chainring with an 10-42t cassette!