The clarrett looks nice, but its lightningbolt. usb 3.1 kills LB in speed and bandwidth, and I am not an apple fan due to all the proprietary stuff they are doing. Sidenote-did you know they are getting rid of headphone jacks on the next Iphone so you can only use headphones they sell? Insane if you ask me. Its too bad because they are a more solid OS platform, they just get a bit too greedy.
Anyway, If I was in the market again, it sounds like focusrite has the best bang for the buck right now.
This is all a little misleading. First-off, it's Thunderbolt not Lightningbolt. Secondly, if you're talking about USB 3.1 the comparison to Thunderbolt (currently Thunderbolt 2) is not fair. If you were to compare Thunderbolt 2 with USB 3 (not 3.1) you would have a more accurate comparison. USB 3 would lose that battle handsomely, but at least the technologies would be from the same generational release. On top of that there are quite a few, although not a ton, of TB2 interfaces, and only a couple USB3 interfaces available as most manufacturers didn't really jump on the tech.
Getting back to USB3.1, when you compare it to the upcoming TB3 there is once again no contest. Not only are the supposed track counts allowed by TB3 around 10x that of USB3.1, the TB3 machines will be able to run interfaces sporting either TB3 or USB3.1 connections (both protocols use the same USB-C style connector). Comparatively USB3.1 machines cannot run TB3 interfaces despite having the same connector, which is a real shame as it limits your choices in interfaces... Although if we see the same trend in USB3/TB2 interfaces with the upcoming USB3.1/TB3 interfaces, there won't be many of the USB3.1 variety anyway.
All of this means very very little to most users outside of large studios as the big gains with these updated protocols are all about achievable track counts with manageable levels of latency. For anybody running a 4 (or less) input interface on even a decent computer could easily get by with perfectly acceptable latency on a USB2 device, despite it being the absolute worst spec of any product still being manufactured.
As to your last sentence: I absolutely agree. I don't think there's anything out there that can touch their Clarrett interfaces for the money, assuming you can work with the Thunderbolt connection.
EDIT: Oh, and as to the whole headphone jacks on iPhones thing... Yeah... I'm still unsure as to how that's going to play out. I use the headphone jack on mine daily. You could always use ANYONE's Bluetooth headphones with it, and I'm sure a lot of third party companies will come out with lightning jack headphones, but it does seem like an odd choice.