I have used Bar Fs for YEARS. My old horse went novice to prelim in them (small TB). While they are not my "go to" boots any longer for MY horses (I prefer boots with tendon guards once we start using studs, and can't use neoprene on either of them), I use them A LOT for every day on other horses, and still compete a lot of lower level horses in them.
They seem to be good boots for EITHER extreme. I have smalls for one of our ponies, but I think I had a client get the XLs for her VERY large draft cross (I think they were Bar Fs). They hold up VERY well (probably still have a few pairs in the 10-15yr old range), even with hard, daily use (better than Woof in my opinion). I throw them in the washer and dryer and they wash up well. While they do hold some amount of water on xc, they don't suddenly become 5lb water weights...I never notice that they are THAT much heavier.
As for the white, well, I don't have any. BUT, I do have lots of white fuzzy boots for my two sensitive skinned horses and I use them several times a week (cycle through my vast collection of fuzzy boots). They also get washed a TON (because both my boys are disgusting sweaters AND they love to creek stomp). They wash up pretty well even with all that abuse. I have the hardest time keeping the velcro clean (tip: don't wash white boots with dark colored things for the velcro to stick to!), but otherwise, they stay quite white (white enough to use them in a DQ lesson ). If you save whites for JUST shows, they'll probably hold up even better.