Get the best glass you can afford!
Unless you got a Sako TRG, you'll probably not want a tank of a scope (like a Bushnell DMR for example)
Nightforce NXS is a decent starting point,
The 'compact' 2-10x42 at 21oz will get you started, but you may want more magnification down the road.
Could probably find an older 5.5-22x50 on the classifieds, and sell it for what you paid once you figure out what you like.
So much of it comes down to personal preference...
The NX8's are pretty 'hot' right now - 2.5-20x50 is cool because they are available with FFP reticles (which you will definitely want to try at some point).
I like the Vortex Razor LHT when it comes to form/function/features and price.
Top tier examples include;
Tangent Theta TT315M
Schmidt and Bender 3-20 ultrashort
Zero Compromise 4-20
March 4.5-28
Edited to add; maybe start a new thread, seems like most are still responding to the original post