OK, man-to-man lesson #1:
Never ever ever base your decisions on the advice of a female, unless that female happens to be your mother (and if that's the case, ALWAYS take it).
Take that all you women out there!!!!
Now, with that out of the way, I thought you already had all your fish picked out for this tank? If I recall you were also looking into larger angels? I really love my purple tang. Lots of personality, so far not aggresive at all, swims all around the tank, very easy to feed, slow grower, very pretty...what more could you want? Plus, being a Vikes fan, he's already got their colors!
A 240 is big, but even with 6 smaller fish in my 180, I already feel that I am at or extremely close to my limit. Its not the waste they produce that worries me, its the decay from uneaten food that gets trapped before they can eat it.