I've read quite a lot around different forums about Edirol FA-66, ESI QuataFire 610, M-Audio firewire 410 and Presonus Firebox.
Out of all these, Presonus Firebox is the one that most people praise for just working out of the box. No hassle, no driver problems, no losing synch. It just works.
Quatafire has been very problematic for many. In fact, one user here was told by the American tech support for ESI that just return the card, they've had a lot of problems with it. The sentiment is echoed on many forums.
QuataFire RMAA results:
http://www.watch.impress.co.jp/av/do...7/dal161_3.htm
http://www.ibsenstudio.no/prod/esi_p...rightmark.html
Edirol FA-66 is harder to find info on. It seems to be ok, but the driver support isn't on the level of M-Audio apparently. The sample rate must be hardware selectec by a switch on the back of the box (!).
RMAA results for FA-66:
http://www.watch.impress.co.jp/av/do...0221/24_96.htm
http://www.watch.impress.co.jp/av/do...221/24_192.htm
M-Audio performs a bit better in RMAA than Edirol, on par with ESI (roughly). It appers to be an ok / solid piece of gear. RMAA results for Firewire 410 (M-Audio):
http://www.ixbt.com/multimedia/m-aud...wire-410.shtml
However, apparently M-Audio and ESI are both based on a same reference design by another company, who also makes the drivers (?), with some company specific tweaks.
The black horse if of course the yet to be shipping Focusrite Saffire, that everybody in forums seem to be drooling over.
I'm going to wait for some reviews on that before I plunk down my hard earned cash.
However, based on what I've read, it's either the Focusrite or Presonus for me (even though Presonus is "only" 24/96 gear).
EDIT: I just read that most of the above are all based on various reference designs by BridgeCo (maybe with manufacturer specific tweaks):
http://www.bridgeco.net/products/beb...ustomers.shtml