I guess it's all academic because I doubt Kelly would take the Ole Miss job, since I'm sure he will be offered a job at a West Coast school (where I imagine he wants to be) within the next year.
What makes it more complicated is that he seems to me a guy that prefers the Northwest, but probably still wants to be P5. Washington isn't going to open up, strongly doubt Stanford, Washington State, or Oregon open up (whatever happens there, it will take a few years to see how it plays out).
That leaves Cal, and Oregon State. He might have mixed feelings about OSU though, since it is instate with Oregon. Could see him at Colorado too, it's certainly possible their head guy could take a different job with another good season.
But I never made an extensive study of Oregon's roster, but my impression was when all was said and done they got most of their players from the same places all the PAC schools do. Some local, a lot of California kids, Polynesia. A few from around the country, particularly Texas (though nothing numberwise like the Big 12 gets from there).
Actually Oregon had a big push to do national recruiting about 8-9 years ago under Kelly. My impression is it didn't get them much, not compared to what even a school like Ohio State does nationally.
Basically my take was Oregon had some really good players at key positions, with the rest being average to maybe a little better by Pac standards. Their success was mostly due to scheme. What I think anyway.
But to waste a little more of your time, Ole Miss (and MSU) are tough recruiting gigs. Very tough. Super hard to get a kid from Louisiana if LSU wants him (or Alabama). Alabama has two schools I won't name.
One bright spot for Ole Miss is that a lot of Memphis kids tend to prefer Ole Miss to Tennessee (Knoxville is a good bit further away).
Arkansas recruits well there too though. Not sure why MSU hasn't gotten more from Memphis, but they haven't. Plus Memphis State sucks up some of those players too.
Ole Miss and MSU are tough recruiting gigs???
I think Kelly's next college job has an abundance of local talent. It may or may not have rich football tradition.