Absolutely. I bought one of these a couple of weeks ago:
This is the Zalman HE-350-U3E. It features both USB 3.0 and eSATA connections, and has a real power switch. No disk encryption. So if the Zalman enclosure ever fails, you can simply move the disk to yet another enclosure, or hook it up internally, to retrieve your data.
There is also the HE-350-U3 model, which is about $2 cheaper and has only the USB 3.0 connection.
The following review helped convince me to get the HE-350-U3E:
Hi Tech Legion review of Zalman HE-350-U3 and -U3E external disk enclosures
Both enclosures will support a 3 TB disk, which is not true of all USB 3.0 enclosures.
A word about chipsets: Actually it’s not the USB 3.0 enclosure that has the Renesas/NEC (or other brand) USB 3.0 controller, it’s the USB 3.0 interface on the computer side. It will be either built into the motherboard, or on a PCI Express card. I have the latter, on a PCI Express 2.0 1x slot.
The enclosure will have its own chipset, to act as the SATA-USB 3.0 bridge. A common one is the Prolific Technologies PL2771 (USB 3.0 only) or PL2773 (USB 3.0 and eSATA). My Zalman enclosure uses a PL2773.
The enclosure’s chipset matters if you want to do SMART monitoring of the external disk. Some SATA-to-USB 3.0 chipsets support it, some don’t. The PL2773 apparently does, because I can monitor HDD temperature etc. through a third-party utility (such as Hard Disk Sentinel) through the USB 3.0 connection.
I am very satisfied with my Zalman enclosure, and will probably buy another HE-350-U3E when/if I buy a second external backup disk. I like having eSATA because I have some other computers that lack USB 3.0, but do have eSATA ports.