Dude, personally I would just upgrade the guitar. If you sell it and buy an MIJ RG, what guarantee would you have that the stock pups are satisfactory? You might end up upgrading the pups anyway.
I did exactly that. I own an MIK RG350 I bought from way back in 1992. Along the way, I changed the pups, pots, 5 way switch and just recently I upgraded my licenced Floyd Rose to a low profile one. Currently, I'm using a PAF Pro for my neck, a Fast Track for mid and a Tone Zone for bridge. Trust me, the guitar isn't valued that much, but I love it. I love the feel and the playability is great. I have never considered selling it or trading it cos I love it too much...I have too much history with it and it serves me well.