I guess my question to you, is why do you feel greedy?
When I bought my machine, I thought it was the end all, and now I wish I had thought more, and gotten a few things mine does not have, like auto tension (how I hate having to mess with tensions) and a auto thread cutter (I honestly think I would save money by having one).
I think the one thing, even though we tell everyone this, to test all the machines out there, just in case the one you thought was your end all, is not. IF I had gone just a step up, (trying to save money) I would have found my end all, or I may have looked at a completely different machine.
Honestly, you need to enjoy your sewing, if your not happy with the machine, you will sew less, and then there is just no point in even having one. I say get what makes you happy and does the things you want.