If you know exactly what you want I'll bring them in.
No one will let you try them or return them.
I don't know which is better, but I'm thinking the MC5 is the way to go. If you're talking about getting it from the US, I suppose I can do the same. Best price I can see is $79.
Honestly, all I want is a set of good headphones that will block out wind noise like earplugs do, and won't fall out or get pulled out by my helmet. I'll likely get the Comply foam tips to make this work even better. But then I'm looking at stuff like the Skullcandy Titans, which are like $30. They might do the job, and with the Comply foam tips, they'll block wind noise and won't fall out.
Are the MC5s $50 better?