Re: $700 To Spend
OP, just curious, you were expecting this response, right?
There are several threads on this forum that advise on waiting on action blueprinting until you change out the barrel. Several gunsmiths say the same thing on their website.
That being said, I think that you should use whatever equipment you feel you can afford if you have the money for it. It's your hobby and livelihood, right? Lots about shooting is psychological, so do what puts your mind in the game and a smile on your face.
Also, if you consider the additional cost in blueprinting your R700 when you do the barrel change, you'll just about break even if you switch to a stiller or defiance when you rebarrel, assuming you sell the R700. You'll have a premium action with lots of other features (side bolt release, double pinned recoil lug, etc.) that you won't need to pay to have done on the R700.
Something else to consider is that the extra $700 you'll spend on reloading gear will pay off soon. Being an engineer, I've done the math. Assuming you have the supplies, the difference between reloading and buying is ~ $115 on 100 rounds. The cost of all my gear for loading 300 WM was $741.93. You will have more than paid for the cost of your reloading kit the 7th time you load a 100 round batch (the 645th round in my case). Use this money you save on shooting to invest in future upgrades on your gun, or even get a something new!