I'm not really looking to spend money on a carrier, but I know of a WAHM who makes affordable ring slings, so I am considering one. I have an Ergo ("Options", so the thick canvas) and a k'tan. My kids run hot and get sweaty pretty easily.

Not sure what to do for this summer with my infant..I need hands free to be able to help/play with my toddler when we're outside or at a museum, park, etc.