I would look into upgrading your skimmer.
You should give the ASM's a look.
When we first started out with a 46, we had a seaclone 100. It worked ok for about a year then just wasn't preforming up to par. We then purchased a ASM G1 and what a difference it made.
We also have a AGA RR 75.
Depending on the type of corals you want to keep, you'll need to get some MH's. With what you have now, I would start out with some hardy Mushrooms.
Oh, Welcome to RS!!