Beginner Gardening: What am I? And should I be repotted?, 0 by Lady_Eagle

Lady_Eagle wrote:
I can't seem to definitively ID this guy. He kinda looks like an Easter Lily cactus (that would be great!; I've always wanted one) but then again he also looks like a Lobivia of some kind. Can anyone shed some light?

He is also really hard to water from the top because he's filled out his pot so completely. I could bottom water, but I'm terribly forgetful and am apt to forget to dump the water, leaving my plants with wet feet. I gently pulled him out of the pot to check his roots and he's pretty rootbound. Should I repot him, or should I wait until spring when active growth commences?