I have bolster seats in my v. I think they are worth the investment. Very comfy while sitting and much more room to stand and lean.
I ordered mine off Greatlakesskipper.com. or maybe Flounderpounder.com I don't remember which. You have to keep checking the sites as their stock varies. I made the bases out of Plywood, epoxy and glass (painted of course).
Here is a picture of the passenger seat.
I have the driver's seat finished and in the boat now and I'll get pictures posted soon (I was away on vacaction for a couple weeks)