I have a few exofficio's, and I find myself reaching for them less and less. The cut is just wrong for my body. The legs are too baggy, even though the elastic at the bottom holds it down. I feel like i'm 'swimming' and have the board shorts with air problem. Maybe i need to go a size smaller, but the waist fits good, and i think a size down would be super tight in the pouch area... maybe i'll order 1 and see.
I have some adiadas coolermax something or others, and those are pretty good for gym wear, but the legs tend to ride up and they don't have a fly, so they suck for daily driver category.
My go-to lately has been some cheapo champion brand that i got at the wholesale club for like $20 /5 pack. They are more cotton than these other types, so they don't wick as well and i couldn't recommend them for gym type activities, but for office wear, they are pretty good. The top elastic doesn't folder over in half when i sit (fat guy problems) like some brands do.
I'm still looking for the undershirt too. I started a thread on that a while back...
I've bought like 10 different brands since then, and i'm still not perfectly happy with any of them.