I don't worry about the limited read/write cycles. Most SSD nowadays will last a very long time regardless. And it's not like there's a patch to install every time you log in to the game. It also depends on the type of memory cells the SSD uses. I put the OS, utility programs, XIV and 1 or 2 other games that I want to load fast on the SSD. Other games and data go on regular HDDs (thank god Steam finally allowed libraries on different drives).

Make sure you check if your mobo has SATA II or SATA III ports, no need to get an SSD faster than your mobo will handle anyway. I'd also highly suggest getting one that supports TRIM. And make sure that when you install it, you set it to AHCI in the BIOS instead of IDE. Finally, if you're really worried about the read/write cycle thing then just get one which uses SLC instead of MLC (but it will be more expensive).