As usual, the bottom build was the most interesting one, IMHO. My takeaways:
1. The i3 does very well for itself. Although it is beaten at some things, the margins are small, and it is clearly "good enough." Where the margins are not small, the application isn't a game, so entirely different selection criteria should be used anyway.
2. On a budget, ongoing operating costs really should not be ignored. The FX-6300 may be a competent general-purpose processor, also "good enough" for anything, but its power use makes it a poor budget choice. I'm going to feel a lot better about recommending the i3 in the forums, knowing there's a solid upgrade path to i5 or i7 later. Furthermore, on a budget, many of the cheap AM3+ boards are really subpar. My only complaint about this H81 (although it is severe) is the lack of USB3.0 header.
3. The costs of building a solid gaming system seem to be climbing along with everything else. As well as this one performed at High-Ultra settings, I'd still like to see what it would take to play well (60+FPS) on Medium-High settings; i3+R7 260 or i3+GTX750Ti ?
4. Once again, it doesn't take a monster PSU to run a good gaming system. Even if you used an overclocked i5, the 450W Rosewill Capstone would have been sufficient.
I used that Rosewill Line-M case for my father's new PC last year, and that front fan is a howler; the first stock Rosewill fan I felt compelled to replace for noise. I used an 800rpm Scythe instead.
I did not use side fans, and with no hot parts in it (I used an i3 + HD7750), I covered the side vents on the inside with corrugated cardboard to reduce noise. I'd use this case again.