Just my opinion, but 10k points per lounge pass is not the best way to spend your points, much better using cash if it's important to access the lounge.
It'd be even better using the 10k points on an upgrademe points redemption which would get you a J fare with lounge access (+ the base fare SC's & points), although the sector would have to be under 600 miles.
If you're silver status you could buy an annual pass (which would also entitle you to 1 guest) for 20k points (the amount you were going to spend anyway) + $150.
Just some ideas!