Macos – Use Color Profiles in OS X to reduce monitor’s color saturation

I've got nice-to-have problem: my new monitor (Dell 3008WFP) has wide color gamut and displays too saturated* colors (magenta and cyan look almost fluorescent).

I'd like to get colors closer to saturation of an average monitor (sRGB?), but preferrably without sacrificing ability to display more saturated colors in color-profile-aware software.

In my monitor's settings I've set color to "Adobe RGB".

OS X recognized my monitor model and has factory profile for it, but I'm not sure if that's appropriate profile. Regardless whether I choose my monitor's factory profile or "Adobe RGB (1998)", colors still look too saturated, and gamma is too low (dark shades are too bright).

I've used Display Calibrations Assistant (in Expert mode) already, and it's not enough. I was able to adjust gamma and temperature, but it doesn't alter color saturation.

Which profile should I choose in Display settings? Should I create my own profile? Can I do it without hardware calibration tool?

Is it even possible to tell OS to limit colors to certain profile for profile-less graphics (e.g. icons, images on the web) and use full capabilities of the monitor for images with color profiles?

*) by "too saturated" I mean more saturated than I'm used to, regardless whether that's theoretically correct saturation or not 🙂

Edit: I've found Firefox about:config settings that achieve desired effect (but in browser only, I'd like that system-wide). It's mode=1 full color management of all content (including untagged) with rendering_intent=3 ICC-Absolute colorimetric and Adobe RGB (1998) display profile [the same profile set in OS's settings doesn't achieve desired effect].

Edit 2: Snow Leopard solves the problem! (well, mostly – after I've sorted out gamma and saturation, subpixel font smoothing looks odd…)