Aquarium size for haddoni and clown pair

[Postal]

I have the option of setting up either a 24 x 24 x 12 tank or a 40 breeder (36 x 18 x 18).
The 24" tank is the much nicer tank (Neo Nano), but I am leaning towards the 40 breeder for the extra water volume (45g vs. approx. 28g).

Either tank will be lit with a custom made 24" 4-bulb t5 lights with SLR's.

Any thoughts?

 

[WDLV]

The 40B allows a little more in the way of options for locating itself where current and lighting are ideal. While I've seen it done, I'd like to see it in something larger.

 

[jlpmps08]

Might as well start BIG! I started with a 20 gallon and 2 months into it I was ready to upgrade into a larger tank! We now have 46 gallon and I want something larger again. My next step up is going to be the last. Now considering nothing smaller than 150g!

 

[Postal]

Might as well start BIG! I started with a 20 gallon and 2 months into it I was ready to upgrade into a larger tank! We now have 46 gallon and I want something larger again. My next step up is going to be the last. Now considering nothing smaller than 150g!

I already have a large system. This will be a stand-alone tank for my office specifically for a carpet and clowns. Not interested in putting anything else with it other than maybe some macro.