I heard bad things about those such as backplanes going bad, or them shipping with missing parts etc. As tempting as they are you are better off saving the aggravation and going with the Supermicro version. You also get redundant PSU, which is kinda a must for storage.
The biggest challenge with these setups is getting enough sata ports though. I really wish they'd make jbod non raid cards that have like 24 ports so you don't have to use up so many PCI slots with small 8 port cards. I like doing the raid at the software level, more expandable and less reliant on hardware, and can be setup live. I use SSD for OS to reduce chance of failure.
I'm in need of a storage upgrade myself, need to retire my old raid 5 array that has a bunch of 1TB drives so I can liberate some slots and make a new array with bigger drives.
I also want to eventually revamp my storage structure in general, maybe look at some kind of iSCSI shared storage setup, as most of my data is VMs anyway, so there would be less overhead going with block storage. It gets more complicated if you want more than one VM host though, which I eventually do want to do, as iSCSI by nature is not shared.