Depends really. Center-X, Midas+, and X-Act all start out as the same run. Post-production they run tests and then brand/market as they grade (good/better/best). With 22lr, each gun seems to like different ones, but if you're going for an all-around starter top shelf then yeah, Center-X should be just fine. Above that you're paying for incremental improvements. So if you already shoot better than you rifle and you're out for 1st place, then splurge. But IMO, if your "minute of angle" is more like "minute of pizza box" the higher grades won't mean much.