From all the benchmarks I've seen, fast SSDs make very little difference for game load times compared to SSDs with more moderate performance. We're talking about maybe shaving a second or two off of load times, which will be mostly unnoticeable in practice. Games are not just loading the files, but processing their contents, so you typically don't gain much by going with a significantly more expensive drive. I would go for whatever SSD gets you the most storage for your money if you intend to install a large collection of games on there without regularly having to uninstall things to reclaim space. Given the choice between a 500GB WD Black SSD, or a 1TB Intel 660p for about the same price, I would want the drive that offers double the capacity with a minimal difference in performance for most real-world tasks. I suppose if one only had a small number of games that they wanted installed, some argument could be made for the smaller, faster drive, but I find it a little hard to justify a doubling in price for maybe a 10% reduction in load times.