Shane,
Congrats!
I've had a lot of success over the years with the Daiwa cross-needle SWR bridges. The new runs run in the neighborhood of $100 - $120 depending on whom you're dealing with. They're good for up to 2 KW power, so if/when you get an amp, you're covered.
And I'd take another look at that coax. My DirecTV install used RG-6, which is a 75 ohm cable, not RG-8X or RG-8. The mast will be fine, but you may have to replace the coax.