Thanks everyone for your replies! I'm not a fan of how my Singer winds the bobbins, and also I like the idea of having several bobbins ready to go so it's easier to change when the bobbin runs out.
I saw the Axis on Amazon for apx. 51.00 and they have the Singer one for 23.00 so I just need to decide who much I want to spend. Like I mentioned to Thimblebug6000, it might be worth it to splurge on the Axis in case I do get another machine that uses a different bobbin that mine. Hmmm... decisions, decisions. lol