I will do a mountainbike-holiday in March and after painully tatooing my shin last year I'd like to get some body armor for that.
But there are so many options out there

I'm thinking that maybe it would be more comfortable if I had seperate knee and shin guards, so that I can put the knee guard on if I go downhills and just leave the shin guards on?

I've been looking at:
O'Neal Sinner Knee guards (think they'd be great but they look so short?)
Race face Khyber Women knee guards
IXS Slope series Knee guards
SixSixone Evo Knee guards

O'Neal Dirt Shin guards
Sixsixone Veggie Shin guards
IXS Hack shin guards


Unfortunately I can't try them on and have to order them online.
Have you tried any of those? Do you regularly use body armor and have any recommendations?