I'd recomend to get raid-controller with some kind of power-backup (so that you do not loose your data if there is power-outage). For some controllers you have to order it separately. And if possible, get controller with capacitor-based power backup (battery must be changed about every year or two). Next, ESXi does not do disk-caching. So get controller with as big on-board cache, as possible.
9260-8i is good, but if you can, get something newer (9266, or 9270). Bu you can also get re-branded LSI controllers (i.e. IBM/Lenovo M5016, which basically is LSI 9270-8i with super-capacitor already included). It costs much less than original LSI...