Monitor Calibration

I recently had a bunch of photos printed via iPhoto. They came back a little on the yellow-side. I’m using the default color profile for my monitor (NEC 950). I just did a custom calibration and it looks like what’s in iPhoto looks a bit more like the photos that I received in the mail but not exactly. My question is this: will dropping the insane amount of coin that apple wants for one of their displays solve my color matching situation or am I better off just continuing to futz with my NEC’s profile? Thoughts appreciated.