Basement wall framing height

I am preparing to frame out my basement. From reading archives and posts here, it appears that a 2"x4" wall with a pressure treated base held about an inch off the concrete wall is the most recommended. I have a tap-con set so would most likely use that to screw the treated boards to the floor.
I have a few questions:
How often should I screw (Tap-con) along the base?

How tall should I make the wall? Do I figure it to fit tight against the upstairs floor joists? Do I figure this a little short and shim it where I nail it to the floor joists? I guesss I am worried about how hard it will be to stand the wall up if it is figured tight. I don't know if it is possible, but it seems like you could jack the joints up as you try to cram the wall in place if it is cut tight.
How often do you nail at the top?

Thanks in advanced!

 

I would cut the studs for the wall to fit to the short joist all of them. Then shim to each joist on top of the wall plate and nail it.
I like to lift the top plate up first to the joist first. This way tap the bottom plate to the wall. It works better than over head . The tap con dont know what code is therefor bottom plate. We do like every 6' ED