Good morning Matt. With your tank full of juveniles that will get much bigger, I'd skip the silver dollars. The guys, and gals over in the Central and South American cichlids sub forum will definitely be able to give you more, here in the off topic Lounge, you probably will not get many responses.
I have had silver dollars for years. Very hardy and active fish.
Very active dither fish. Helps calm tank from territorial fish.
Unafraid but a little skittish.
Love to eat everything. Swim together.
5 might be a bit much when they get large.
I also love clown loaches but not really SA.
I would suggest an earth eater or 2.