For the most part unless you get the chance to pick your parts before hand, you get what comes in the package... And out of the 3, I would go for the last one... it comes with PCIE so you can upgrade later on. But if you have to go this route, then get a different PSU... In most cases (actual cases that come with powers supplies) they are the cheapest thing they could find, so I would get a new one.
But to be totally honest... If you don't have to buy it now, I recommend you wait. Save your money, and biuld one later on down the road when this years batch of hardware comes out and you can see what goes down in price... IMHO
Dell 4K S2817Q / Logitech Z-680 / Func MS3 Mouse / Corsair K70
NZXT Source 530 / i7-3770K / Corsair H100 / ASRock Z77 Extreme4 / SoundBlaster Recon3d
Samsung 850 PRO 512GB SSD/Seagate 1TB/2TB/WD 2TB
4x4GB Corsair Vengeance 2133 / PNY GTX 980 ti/ Seasonic M12II 850W