If you are looking for the best bang per buck, you will love this page. We looked each card's current USD price up on Newegg and used it and all relative performance numbers to calculate the performance-per-dollar index. For products no longer available, the last available reasonable price point was considered.
Update: Since MSRP priced Vega cards are not available anywhere, we have added a data point at current in-stock prices (which do include two bundled games).