1. Lady Aurora - 12" tall with diffuser downstem and gram bowl. 2. Lord Odin - 13" tall with half gram bowl and lots of power. 3. Name Pending - 18" tall with Icecatcher and Unique half gram bowl.
Don't get the big one just because of the donut, it looks nice but bigger bongs are a hassle. You need more lung power, more lung room, and then a place to hide it. It is the best option if you can meet those requirements. If not, the one on the right with an actual base is the next best option. They're all grommet pieces, so your options arent the best here, i'd get the middle.
The one on the left. I find big bongs dont hit as I would like them. Back when I was younger I was all about the big bong rips but now it seems taking half rips, but more of them get me where i need to be. Plus bigger bongs seem to break easier with me and my friends