Tascam US 2000 16 in, 4 out USB interface.
Great product - does what it says on the box, straightforward installation, and will run at 96 kHz if you want it to. For me it allowed me to continue to use my old interface mic pre-amps straight into the 6 line level inputs, and solved an issue with my laptop that meant I could not use a firewire interface.
To be fair if you really push this interface you may have some problems with latency, but if you want to record 16 tracks of audio this will do it. I am less confident at 96Khz with a large project, but this may be a limitation of my particular setup, or the USB 2 interface, or the US 2000 itself.
I like this interface. The zero latency monitoring is functional, and works well. The additional monitor out is useful for adjusting control room levels. The digital output allows me to use the Focusrite VRM box (see separate review) to monitor on headphones and frees up the headphones output. You will be monitoring the same mix as the artist for overdubs and tracking, unless you have some kind of separate headphone amp, and send a separate output from your DAW to outputs 3+4. The mic preamps are clean, and feature good headroom and gain, with a neutral non-coloured frequency response.
Conclusion: Great value for the facilities, straightforward, easy to install.