I've tried only a couple of the other boots, but I'm not sure I can ever give up homeguard. I wouldn't be surprised if it's nerfed though. :S
I got caught like an idiot in my last game, might have killed their AP carry as I went down to their team as Zed. I think it might have been the same fight though, by the time it was all over and their support + AD were left to take down the front mid turret, I had revived, raced up the middle with boots of mobility + homeguard, and I think doublekilled them. I love moving fast.