Well the thing is that the topic is about best bang for the buck CPUs, you can get a nice FM2+ X88 board with tones of features like the MSI A88XM-E45 at only $66.00 and pair it with Athlon II 760K at $90. You can OC to 4.2-4.4GHz with default Cooler and have Core i3+ performance with more features at lower price.
Or,
You could install the Xigmatek Gaia SD1283 only for $32.00, OC to 4.8-5GHz and get to another level of performance with more features for less than a Core i3 Haswell.
Core i3 4130 = $130.00
Core i3 4330 = $150.00
Athlon 760K = $90.00
Xigmatek Gaia SD1283 = $32.00
Total = 122.00
Not only that, you are able to upgrade to Kaveri if you need more CPU performance later on.
To sum up, you pay less for more features with AMD CPUs/APUs/Motherboards than Intel or you get higher performance at lower or the same price(When OC)
At entry level (H81 + Pentium), with Intel you sacrifice Features, MultiThreding Performance and OverClocking at the same price as AMD 750K + X75/87 boards. Same applies for mainstream (Core i3).
It is only the high end H87/Z78 with Core i5/7 that Intel can give you same features and higher performance but at higher prices again.
is Kaveri really a significant CPU performance upgrade anyway? the leaks didn't show that, looks like we are going to have to wait a little bit longer to have a good answer for this question, but anyway, "i3+" performance on what?
TrinityRichland performance is not really that amazing compared to haswell i3, even with much higher clock,
sure MT should be a strong point, but the difference in ST performance is not small(and even compared to the Am3+ CPUs, the lack of l3 in some limited cases can
hurt)
one example using all the cores for video encoding,
http://www.bit-tech.net/hardware/2013/11/14/intel-core-i3-4130-haswell-review/3 Richland at 4.7GHz can barely have any advantage over the i3 at 3.4, and that's for a usage where having 2 cores should be a bad thing, now look at the previous graphic and see the difference...
surely there are more favorable cases for the A10 (as there are many more for the i3), but still, Haswell i3 looks ok compared to it overclocked in many MT programs, it's certainly going to beat easily on ST and most games, and all of that without any OC, and comfortable TDP (it's 54w I think, but the IGP is taking some of that), doing that at a much lower TDP , without any tweaking should be an advantage.
and now with H81 (it was not the case with H61, but B75 was already almost there) offering Intel Sata III and USB 3.0 for $50 MBs, it's even harder, you can combine the i3, pentium or whatever with a $50 MB without loosing anything significant, while using some random $50 A55 MB for an overclocked Richland doesn't sound like the best idea.
you could bring the 6300 to this discussion, and it would certainlly add a significant CPU performance, but running it well with a $50 MB and stock cooler just doesn't sound that realistic, and the i3 will still hold its st advantage.
the best "bang for the buck" is not that simple