I keep rams myself, but do not recommend them to beginners because they are almost guaranteed to break out in ich a couple of days after you get them. On the other hand, if you are prepared and always keep medication at hand, the you should not have problems curing them. The size tank you have will take a pair nicely.
Some people say cardinals should only go into established aquariums, this is not the experience I have had with them. For me they worked fine in a new set up. Same people often say that Corys should only go into an established aquarium, too.
p.s. it may make a difference that when I talk about my own experiences, I often mean in a heavily planted set-up, even when it is new.
Well, I do plan to have at least a moderately planted tank. I appreciate all the advice you have given. It is also very helpful to know WHY GBRs are not recommended for beginners... Just the standard "not recommended for beginners" doesn't explain the reason. Knowing that it is because of an ich issue, makes it much easier for a beginner to be prepared and act a lot less LIKE a beginner with them!
I guess some fish is going to have to be the first in! Whether it is the corys or the cardinals or something else, something has to be first.
In my 55 gall I have
10 harlequin rasboras
10 rummy nose tetras
10 cardinals
6 pepper corys
6 julii corys
There is always something to look at, everyone gets along and the different species are good shoalers. If you were to add the cardinals last, by the time the other species are quarantined your tank should be fine for the cards. With a similar stocking you would still have room for a pair of rams or apistos down the line if your water was suitable
I appreciate hearing this stocking list. I have considered a third schooling species. How long is your 55? Mine will only be 30" long, 18" wide and 24" tall.
anon, have any pics you could share?