Choosing a waste holding tank for my 1980 H30

[EdWard3]

Okay, so it's taken me 2 years to finally come up with a practical design that suits me for a MSD on my 1980 H30. And since the existing system is broken and smelly, my next step is to rip out the old and put in the new.

Can anyone make a recommendation on a manufacturer for a waste holding tank? I've looked around, but I don't see anything that knocks my socks off.
I'm thinking between the 9-11 gallon range and installing it in the vbirth under the port access panel (where existing holding tank and thru-hulls are).

 

[Bill1565]

Ronco has about 400 different sizes and shapes. Don't want to know about your personal habits but we two will fill a 20 gallon tank in 5 or 6 days

 

[Amos Cape]

I removed the water tank and installed the water, holding tank in its place. I think I went with two 15 gal tanks. It worked out very well. I also replaced all the plumbing at the same time.

 

[Ian McGain]

Put in the largest size you can fit. The pump-out cost is the same for a 30 gallon tank as it is for a 6 gallon tank. As it is in many things in life-bigger is better. There are custom made tanks available that will fit in the port side of the v-berth.