Where did you pick up the WOA Upper from?
Here are some of my suggestions. It seems like you have a budget in mind but dont want to sacrafice too much. Keeping that in mind, here are some of my suggestions.
Are you sure you really want the PRS Stock? Its big, Bulky and expensive. Yes, it is a well made quality product but at the end of the day a standard A2 Buttstock serves the same purpose and is a hell of alot cheaper.
I once owned the Nikon Monarch UUC 6.5-20X44 which sat on top of my Remington PSS. I sold it because It was heavy, didnt have any mil-dots (which are vital if you REALLY want to learn the concept of long range marksmanship and too much for what i needed. If you are looking for an SPR setup, 6.5-20 is much, much more than you will need. anything fixed or variable from 4-14x is plenty of magnification. Saying that, i would suggest you check out SWFA's Super Sniper scopes in the 10x42, 16x42 or 20x42 configuration. They run under $300 and everyone who ones own gives it high praise. Spend the money you save on a quality one piece mount or quality rings. You will want High or Extra high rings so that you can get all the MOA you need at those really long distances. Have fun