You finally got her out of hock. LOL. I would not hesitate to put the 10s on. It really brings this guitar to life.
What do you think about the position dots on the side of the guitar. I use them a lot and I find that they are really hard to see on this Tele. I had heard that teles are hard to get the intonation set on them because of the saddles sharing two strings.
Mine had a pro set up before I got it and the intonation is spot on. From my experience I think you will really like the pickups in this one. They are really sweet.
As for the case. I spent 75 dollars a while back for one of those sightly used cases. Yours is a good deal for sure. I like the hard plastic case to keep the necks firmly in place. The averqge home has so many fluctuations in heat and cold it keeps them straight.