You may be able to use these lower-cost SSDs, but go in with eyes-wide-open. Consumer-grade (or "Client") SSDs will typically have lower endurance ratings, and will exhibit lower throughput under data center workloads.
Your notation of the "consumer-grade SSDs" is apt.Yes, this is one of our SSDs specifically designed for data center, server-type workloads, and sounds like a good fit for your application. Have you seen this link, pretty handy comparison of all the somewhat current controllers. The H700 has been solid and available with 1Gb cache, I know the newer Dell servers are up to the H730, H730p, and H830 controllers, so I'm guessing you can pickup an H700 a little cheaper. Nothing positive written about them on this site. As far as the OP, I think I would avoid those H200 controllers. I'd like to see the tests with up to date hardware, they seemed vague on what they used. I found the numbers on the overprovisioning very interesting, as from my understanding, that's what separates an enterprise class drive from a consumer grade. Some of the concerns brought up are things that we don't worry about as much as we used to. That's a pretty interesting read, but it is almost four years old, which is a lifetime as far as SSD technology. So, just keep it in mind when designing a SSD based RAID system. ]The Pitfalls of Deploying Solid-State Drive RAIDs - IBM
Take a look at this research piece from IBM for more information on it. There's also the fact that a lot of RAID controllers will experience I/O bottlenecks with SSD's. RAID 5 is acceptable for SSD's but not recommended due to the increased writes it generates, especially on SLC SSD's. RAID 0 doesn't make sense, and neither does RAID 01. Thanks for pointing out the issue with TRIM support.