Nice score. I think you did good, especially with the upgrades you mentioned, and that the bass speaks to you.
I like MIM Fenders in general, and have a few very nice ones. Like you, I took a chance on a MIM P bass for $400 because the seller had a buncha upgrades on it, including a EMG Px pickup that I was interested in. Turns out, it's a terrific 8.5 lb bass. I feel like I stole it.