Well there is no need to worry about the Gouramis being aggressive to one another. One died about 8 hours after I got it.
I took them both back (yes, they took my dead fish). The one that died was acting strangely after he got to my tank, and at one point, I noticed what I thought was one of his feelers all bunched up and raw looking. I figured one of the rasboras go to it or something. Little did I know that both his feelers were fine and that what I was seeing was a long stringy white fecal mass coming from his anus. The other one began exhibiting the same long stringy white feces before the other died, but it was acting normal. I looked around the internet and determined that they must have had some kind of parasite when I got them.
That's ok. The rasboras are absolutely thriving and seem to be having a great time in the tank. They consistently school together and appear to be having quite obvious fun. They will chase each other, pair off and race around it seems, and they really enjoy playing in the bubbles. Their favorite hobby I have noticed is swimming against the current of the filter as if it were a treadmill (they do this often). They have been eating a healthy mixture of flakes, crisps, and blood worm. I feed them twice a day (not more than they eat in a few minutes). They seem to be having a blast and will probably end up as long term residents.
I still want to get more fish for the tank, but I think I will go to the fish store instead of PetCo. They have been less than stellar.
Oh, there is one addition to the tank besides the rasboras. It appears a tiny snail got in somehow along the way. He crawls around and seems to be enjoying himself. I know these are seen as bad, but I don't really mind him in there. If he reproduces to the point of it being an issue, i'll do something. Until then he can chill wherever.
I also have brown algae growing atop my Parthenon and pillars. Should I be worried? Or am I stocking up on snail food for the future?
Here as some photos of the Harlequins. If you can't noticed by the orange blurs that are the fish, they don't stop moving very much.
Here they are being a bit more stationary:
Poor Gouramis: