FWIW, I own an old chest freezer that the previous owner made into a keezer (how convenient!) and yet I had the intentions of using it for fermenting (primarily lagering). Some time has gone by and I now realize that it is a pain to move full carboys out of there even with the handle I have for mine. I don't actually do kegging yet, but I am planning to after the holidays and doubt I'll do much primary in there after that. While I won't be using the capacity for all active kegs, I intend to secondary over to kegs, pressurize and let them sit until there are taps available. Down the road I hope to get a stand-up freezer or fridge (really, whatever I can find for cheap at the time) to do primary fermenting in, but for now this is the setup I'm using. So, long story short, freezer is a pain for pulling full carboys out of. If that's not an issue, go for it, they hold a lot more for the same price. Plus, search craigslist and you may even find one for cheap!