If you want the 2 oscars I would go for it, people seem to have pretty good luck with 2. 3 is often an issue, because somebody ends up the "third wheel" and gets hammered by the other 2...but I would definitely go for it.
BN pleco, syno cat, or big pictus (like 4-line) are all solid cat options too.
BN pleco, syno cat, or big pictus (like 4-line) are all solid cat options too.