I'm concerned about them being rootbound; the upside down canoe shaped leaves (thanks stinky) are bothering me. The problem is that I can't fit three of the next biggest pots into my closet.....

I'm thinking of just putting a big Rubbermaid tub in there next time around, like the one I use the hold my nutes/supplies in. Drill a couple holes in the bottom for drainage, fill it with soil, and set it on the racks...it would be a perfect place to transplant after the ones I have them in now.