Best bang for my buck

Rammy

Honorable
They are all broadly similar, but none have very good graphics and none of them really have the PSU to accommodate you adding a decent one in later.

If it had to be one of those, then the first one, the FX6300 and HD7750 is probably the one to get, simply because it has the strongest graphics card. The FX8320+GTX650 combo would be a pretty close second as its $80 more and doesn't really justify it. The i5 system is nonsense really, it has a small PSU, expensive (and good) CPU in a motherboard that doesn't support its main selling point, and a graphics card which may or may not be DDR3 (but either way it's very weak). It also has half the HDD and slower RAM.