Resident Audio has some nice T-bolt interfaces, they're an off-shoot of Zoom - quality stuff. Probably cheaper than the focusrite.
http://www.residentaudio.com/
They're not quite up to the level of features I need for recording. That's been the problem I've had, because there have been some other Thunderbolt interfaces debuted in recent years. They're usually either just a few channels and super expensive, 8 channel but no preamps or 8 channels with so-so preamps. I really like the Focusrite preamps. Once I got my Liquid Saffire 56 I sold all my outboard preamps, eventually. The new Focusrite models are pretty much upgraded version of the 56 and a version of the OctoPre as an actual interface. They have 8 preamps, 8 analog I/O, a couple different digital I/O, monitor and headphone controls. If I got the bigger new one, I could still use my Octopre for expansion when I need 16 inputs, as it's just an ADAT preamp expansion and not an interface by itself. If I only just recorded at home and never did live band stuff I could easily get away with 2-4 inputs and use something like those Resident Audio units or some of the other smaller Thunderbolt interfaces I've seen around lately.