We only have the 660p at the moment. Reworking the test plan too, industry pushback on the 5% test area. They want to see some 1% tests that are more gentle on the cache and perhaps more indicative of light consumer workloads.
The problem is the vendors get grumpy with us when we start looking at that as they're not really supported and most consumer drives will do poorly in enterprise workloads. The cost delta between high end consumer and cheap SATA enterprise has also closed.
Who knows...Seagate and WD for that matter really need to put together a coherent flash strategy. But with very good options especially in the end user space, unless these drives are cheap, there's really no reason to even consider them.
I'm confused...you want to know how much better an SSD is over a SAS HDD? The answer is a lot...endurance isn't really an issue but you need to understand your workload if you're sourcing your own drives and not buying as part of a packaged array.