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BTW, you realize, 3750v2s are end-of-sale?
Correct, a 2960X might have higher fabric bandwidth and PPS ratings than a 3750v2, but that doesn't mean it's faster or better. For fabric bandwidths and PPSs, you need to look at the needs of the ports on the device.
A 3750v2 with 48 copper FE ports, and 4 SFP gig ports, has 8.8 Gbps of port bandwidth. So a non-blocking fabric needs to support 17.6 Gbps. As you note, the 3750v2 fabric is listed as 32 Gbps, so you're covered there.
The same 8.8 Gbps of port bandwidth needs up to 13.0944 Mpps (1.488 Mpps per gig) for wire-rate for minimum size Ethernet. Your noted 13 Mpps seems to cover that too.
So, basically, a 3750v2 switch is wire-rate capable.
When you get into stack bandwidth, even more that other switch parameters, there's lies, dam lies, and device performance specifications. Trying to judge one stack architecture against the other, gets very complicated very quickly.
On the 2960 series, I believe Cisco is "adding" each switch to switch ring link to an aggregate total. In an ideal situation, if traffic only needed to go from switch 1 to switch 2, and from switch 2 to switch 3, then the aggregate summation does have a bandwidth advantage over StackWise "bus" like ring usage. If traffic needs to go from between all 3 switches, traffic to from switch 1 to switch 3 will need to share the bandwidth also being used by traffic from switch 1 to switch 2.
I.e. a 2960 80 Gbps doesn't mean you get 80 Gbps between just two switches, or the advantage of all 80 Gbps found within a maximum member 2960 stack.
(As an aside, compare StackWise vs. StackWise Plus. The latter has twice the physical bandwidth, but it also operates much "smarter". Again, unwinding how stacks work, and their impact to your needs, is complicated.)
There's also more to a switch's performance than raw bandwidths and PPS rates. The switch's architecture, and other switch specifications, can make a big difference in real-world performance. You'll find 3560/3750s with the fabric bandwidths and PPS rates same as some 49xx switches, but the latter often will deal with busy servers much, much better, due to different port buffering.
All the above, also means, without some real analysis of both your needs and devices being considered, anyone's recommendations should be taken with a large grain of salt; including mine. ;)
That said, for simple L2 edge port usage, the less expensive 2960 series might be just fine for you. If you want to reduce costs even more, you might also look at Cisco's SMB switches, some I think are also now stackable.
