Just a quick note here to help you out while you're waiting for those experience reports to show up...
The AVS Sport is Yokohama's top-of-the-line performance tire. Its price and performance are slightly less than competing top-of-the-line performance tires such as the Bridgestone S-03 and Goodyear GS-D3. However, the AVS Sport is not available in the 225/40-17 front size that you mention, nor is it available in the 215/40-17 size that is the most commonly used size on NSXs with 17" front wheels. The following are a couple of alternative suggestions that offer the "bang for the buck" you seem to be looking for, that come in sizes that will fit the NSX nicely.
The A520 was Yokohama's value-oriented performance tire, meaning that it offers some good performance for those looking to spend less than for a top-of-the-line tire. I assume it has been discontinued because of the introduction of the AVS ES100 to Yokohama's line-up in that same role. So if the reasons you preferred the A520 are the typical ones - a desire for a lower-priced (and somewhat longer-lived) tire, along with a willingness to accept somewhat less performance than pricier, top-of-the-line tires, then you might be interested in considering the ES100. It is widely considered to be an outstanding value for the money. The 215/40-17 is $100/tire at the Tire Rack, and the 255/40-17 is $112 (compared with $150 for the AVS Sport in that size).
If you are looking for better performance than the ES100 and willing to spend slightly more than that, while trying to spend less than tires such as the S-03 and GS-D3, another tire worth considering is the Kumho Ecsta MX, which is Kumho's top-of-the-line performance tire. It does come in the NSX-friendly sizes of 215/40-17 ($102/tire) and 255/40-17 ($130).
There are lots of good tires on the market these days. Depending on what trade-offs you're willing to make, I'm sure there is a tire out there that will fit your needs (and sizes) perfectly. Hope this additional information is helpful to you.