A note on the Mushkin SSDs, keep in mind that they're part of a series of drives which omit the inclusion of a DRAM cache to save costs. See this video for an explanation:
The TL;DW is that they're still faster than a regular HDD, but if you can find a similarly priced SSD with a DRAM cache then it's usually worth it to go for that instead. This is because being DRAM-less typically results in the SSD being slower with a lower lifespan. The Crucial MX500 is generally considered to be great value in terms of price vs performance and it's only about R300 more than the Mushkin on Wootware for a 1TB drive:
Buy Crucial CT1000MX500SSD4 MX500 1TB M.2 (2280) SATA 6Gb/s Solid State Drive at Wootware with fast shipping & superb service.
www.wootware.co.za
Like the poster above said, it's also usually a good idea to go with one SSD for your boot drive and apps/games, then add a high capacity HDD for storage.