What can I say - I spend about 30 weeks of the year out in the field and most of that is in a tent or shelter.
My own personal choice is the Mega Light; I have had one for 5 years now and I love it!!!
I use it for sea kayaking, hiking, even in the snow - it works dang well and it is so adaptable to so many situations.
It is quick and easy to pitch, roomy (for 2 people anyway, might be tight with 4 considering the angle of the sides) and handles all sort of conditions - with the footprint it is a blessing.
The only thing is in high winds it acts as a sail (it has only collapsed twice on me) and the bugs get in (don't have the bug shelter), other wise it is my choice due to it's light weight, funky colour and ease of use as my personal shelter and emergency shelter.
You can not go wrong!
I chew through sunglasses and I am very selective about them as well - you have to look good up on the peaks!
I love the lightweight design, the soft padding is excellent and the lens's are very resilient (thus far). Most sunglass brands give me a headache at the temples, however I found the Prophets to be extremely comfortable!
I would have preferred more wrap around coverage, however they do still offer a decent amount of protection.
The interchangeable lens are fiddly and it takes a bit of time to swap (especially in the field) although the plus side is that you can remove the old scratched lens (if you manage to scratch them) and replace them.
I use them all the time whether sipping lattes, banging out the miles in a sea kayak, hanging off the cliffs, sailing into heavy seas or bagging that snowy peak...and they are still strong!
Get a pair!