I really liked the S6500 and SL390s blades, but the noise was a bit higher than I liked. Not terrible, but not ideal for me. The performance for the footprint was unbeatable for a home lab. Running vSAN with enterprise SSDs on Infiniband was screaming fast compared to NFS, even with the slow 6G controllers.
I ultimately decided to go another direction, but only because I had a pile of R715s at my disposal. #firstworldproblems
If anyone is interested, PM me and I'll make you a great deal on the blade chassis and blades with the Infiniband/10G cards, and I'll even throw in a pile of hex core L5640s. It's literally collecting dust on my basement floor. Also, DaSaint's is probably available too - and if you're really looking for a deal ask me about buying both, we could probably throw them on a pallet and ship them together.