The Intel's S4610 that @Jimmy9008 referred to in his original post, is sold by Dell as well. We have a couple of Dell servers on order with those drives (Dell branded).
I wouldn't use consumer SSDs in a server at all. They don't have power protection and not as good wear leveling. And the price difference between the better consumer drives and the read intensive enterprise drives is not big.
Anyway, the only problem I see with buying the Intel drives from somewhere else and not Dell, is that they will be under Intel warranty and support and not Dell. So if you need 4h mission critical support on those drives, you better have a spare on the shelf instead.
Dell has to stock them for warranty and Dell has to make money of them and the price have to be high enough so that Dell can give their large customers a big discount and still have some profit left. That's why the Dell branded drives are much more expensive.
Why not buy two S4610 drives in smaller capacity like 240GB or 480GB and put them in a server and see how it works?
Looks like two 480 GB drives will be around £300.
A lower cost alternative is the S4510 drives. They can't handle as many writes as the S4610 but will still be overkill for most workloads.