There are ASIO drivers for Zoom products, AFAIK. At least I DL:d one for my ZoomH2.

I've read several comments by happy R24 users, but it surely is much more complex to set up and use. So if you don't really need the extra features it offers, I'd recommend an "ordinary" USB-interface.

In looking at the website, I also thought I saw where the Zoom uses ASIO, but I still stand by my former post on multi-function devices. 

There are ASIO drivers for Zoom products, AFAIK. At least I DL:d one for my ZoomH2.

 
That's good to know.

Can anyone advise whether something like this Alesis mixer would be appropriate as an interface in MC6? There are no drivers and it does not make any reference to latency. Just wondered if anyone had considered somethign liek this before.

http://www.alesis.com/spotmm8usbfx

I personally do not recommend the Alesis USB mixers because they use the windows USB codec for drivers and do not have their own low latency drivers.

if you want good advice on what kind of soundcard to get, check my website.  I have a spreadsheet with a lot of choices.

My advice..... again... 

quit messing with,  and looking at the toys and the gimmicky stuff  and get a serious pro quality audio/midi interface.  
 
You will not regret buying good quality gear, but you will regret buying a POC gimmicky toy.  

Ultimately, it's what you want, it's your choice.... so choose wisely,  since you will have to work with it.

http://www.guitarcenter.com/Cakewalk-V-Studio-100-Portable-Music-Studio-105487599-i1449577.gc
 
http://www.guitarcenter.com/Cakewalk-V-Studio-20-Stereo-Audio-Interface-106073067-i1526693.gc
(may not be 64-bit compatible)
 
http://www.guitarcenter.com/Focusrite-Scarlett-18i6-USB-Audio-Interface-106731359-i1882487.gc
 
http://www.guitarcenter.com/Line-6-POD-Studio-KB37-USB-Audio-Interface-with-POD-Farm-Plug-in-105634240-i1435738.gc