This is all great news. I'm hoping Tascam adds onboard DSP in the future. That's what it would take for me to consider a change. With that said, the strides Tascam is achieving latency wise is the only reason this perked my interest. 

The UH 7000 includes dsp.  I don't know about these newest models.  The review of the 7000 is out in Tape Op now.
 
http://tapeop.com/reviews/gear/103/uh-7000-mic-preamp-usb-interface/
 
@

The new models do not include DSP. I think they blew their budget on the mic pres.

96k tracking is worth every trade off if your system can take it. There are many people that track at 96k and mix at 48k. I feel like I just heard someone talking about this in the last few weeks, maybe at AES.

I wanted to add a few facts about my Presonus VSL44...
1. 64 buffers is only available at 44.1 and 48 kHz.
2. At 96 kHz 128 is the minimum, but roundtrip latency is 4.7.

clintmartin
I wanted to add a few facts about my Presonus VSL44...
1. 64 buffers is only available at 44.1 and 48 kHz.
2. At 96 kHz 128 is the minimum, but roundtrip latency is 4.7.

Thanks for the update. Interesting that at 96 kHz the PreSonus latency is only about 10% more than the TASCAM despite doubling the number of buffers.
 
The more I test, the more I find interesting things. For example, in comparing the TASCAM round-trip latency to the V-Studio, at lower sample buffers the results are fairly similar but if you increase the number of sample buffers, the latency increases much more for the V-Studio. The more sample buffers, the bigger the difference.
 
One issue I've found with the TASCAM interfaces (it helps to read the manual, LOL) is that each input has separate XLR and 1/4" jacks, but you don't want to plug into both at the same time...use one or the other. A feature I thought I wouldn't use was having two instrument inputs because I don't record with another guitarist 99% of the time. However, I have guitar plugged into one input and bass into the other - one less thing to re-patch. 
 

Craig,
Did you test the unit on a USB 3.0 port.  Tascam says it works on them. I know Focusrite and Presonus
were having trouble on USB 3.0 ports.
 
Thanks,
 

InstrEd
Craig,
Did you test the unit on a USB 3.0 port.  Tascam says it works on them. I know Focusrite and Presonus
were having trouble on USB 3.0 ports.
 
Thanks,
 

That's why Presonus released the new drivers. Unfortunatley the new drivers make the latency worse. I rolled back to the older drivers and use usb 2.0. I asked support and Presonus did say that the usb 3 didn't improve the performance at all. It only made the usb 3 jacks available.

InstrEd
Did you test the unit on a USB 3.0 port.  Tascam says it works on them. I know Focusrite and Presonus
were having trouble on USB 3.0 ports.

The US-2x2 and 4s4 both work fine with the USB 3.0 ports on my notebook, which was manufactured within the past two years. I have not tested with my desktop yet, whose motherboard was one of the very early ones with USB 3.0. It's pretty squirrely with USB 3.0 devices, so I don't have high expectations. If the TASCAM interfaces work with it, they'll probably work with anything that has USB 3.0.

InstrEd
Did you test the unit on a USB 3.0 port.  Tascam says it works on them. I know Focusrite and Presonus
were having trouble on USB 3.0 ports.

The US-2x2 and 4s4 both work fine with the USB 3.0 ports on my notebook, which was manufactured within the past two years. I have not tested with my desktop yet, whose motherboard was one of the very early ones with USB 3.0. It's pretty squirrely with USB 3.0 devices, so I don't have high expectations. If the TASCAM interfaces work with it, they'll probably work with anything that has USB 3.0.