My 40 gallon, open for suggestions

I dont think I want to paint it, because I might decide I want a different color background someday
 
so say I wanted a few cories and maybe a betta(in addition to the swordtails)
would that finish the stock or could I do some tetras
 
lol that pic is from 2 days ago, there isnt much to update exept I have one fish in there now
 
there...

that blue is just gravel fromt eh old tank in a panty hose

fishtank 025.jpg
 
alright, the female finally gaave birth so she was acclimated and she is in the 40 now

So I think I decided I want a betta. What else besides some (some being 6-8) swordtails and a betta.
 
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