which brake should I buy?

[Frayed]

Hi, so my stock tektro rear u brake has had it (keeps losing tension) so I am looking at a replacement. I was looking at the Odyssey Evo 2 but noticed these FLY Clasico on sale. I am just wondering if any one has had any experience setting up and riding with either of them? I am also happy to look at other alternatives.
Cheers.

 

[singlespeedfreeride]

i ran the fly caliper for a while and it was great, easy to set up and kept tension very well. both calipers are supposed to be good, but ive only used a fly caliper.