external SSD: USB3 or thunderbolt?

[KaraH]

Hasn't been mentioned yet, but you'll want to look for an enclosure that supports UAS or UASP for USB 3.0.

Not all enclosures support the protocol. INside, there likely will be an ASMedia 1053 bridgechip.

You should be able to get 300+MB/sec with a good SSD.

Not sure if it does, here is what I already ordered:

http://eshop.macsales.com/item/Other World Computing/DIYSSDP480F8/