I'd recommend against NexStar, specifically their current gen MX box, which has eSata/USB3 and RAID capability.
I have an older NexStar MX USB2 box that's been very reliable for years running RAID1. Based on this, I bought a couple of their newer eSata/USB3 NST-400MX-S3R boxes for work, put some WD Red drives in them (one with 2x2TB, one with 2x3TB, both running Raid1), and started using them for data archives. Both boxes have corrupted the data several times, and I've taken them out of service after spending many hours recovering data. I set up the 2x2TB as individual drives as a test, and it corrupted one of them as well.
Amazon's review page for these boxes has multiple reviews with the same problems. My older USB2 box is still running well, and recently survived the loss of one of its old 2TB Samsung drives with no problems.
I've switched to WD MyBook Duos, which have been much more reliable, but are a bit pricey (and not what you're asking about). They come set up as Raid0, so have to be switched over to reduce data risk, and want to install a driver as well.