THAT is what makes the 700's, the ability to find so many differant sights, triggers, bases, barrels, stocks, BOTTOM METAL!, etc.
Its the Chevy 350 of the rifle world.
Maybe its not the best out there, but it sure makes it a lot easier to design/build/add-to, whatever it takes to get the end product of what you want.
The SPS is a perfect buy, if you just don't see what you want in the "Rifle-World". Then as time goes, and money is available, build it to what YOU want.
I've a couple with detachable mag systems now that I just love. Excellent triggers, top of the line bases/rings, very good/the best stocks...sure, its taken me some time, but-what the hay? So does switching/trading rifles off and buying others, none being "exactly" what I truly want.
Does this "jibberish" make sense?
Good Luck guys!