[LAD] RME FIREFACE 400? RME MULTIFACE II?

Hi :) I only watched pictures and read texts but didn't hear one of those RME devices, anyway, until now I tend to order the RME FIREFACE 400 or RME MULTIFACE II if they shouldn't cause issues with Linux. The two HDSP be possible too. Any experiences, information? RME FIREFACE 400 http://www.thomann.de/gb/rme_fireface_400.htm RME MULTIFACE II http://www.thomann.de/gb/rme_multiface_ii.htm RME HDSP 9652 http://www.thomann.de/gb/rme_digi_9652_hdsp.htm http://www.thomann.de/gb/rme_9652_hdsp_retour.htm RME HDSP 9632 http://www.thomann.de/gb/rme_digi_9632_hdsp_pcikarte.htm The sound quality at least should reach that of my elCheapo consumer DAT Sony DTC-670. The Terratec EWX 24/96 does hardly reach the sound quality of my Yamaha MT44D 4 track analog cassette recorder, when it wasn't broken, but well maintained and I heard several Envy24 cards that hardly reach the 4 track recorders quality. I'm not interested in this one, but the price-performance ratio is amazing: BEHRINGER XENYX X2442 USB http://www.thomann.de/gb/behringer_xenyx_x2442_usb.htm I've got a Behringer EURORACK UB2442FX-PRO a very bad mixer, hard to clean, hard to use, because everything is small, even if it's dust protected, after 3 years dust issues started. All faders are still ok, but Group buttons are completely out of order, some channels don't work any more. I don't had enough money to get a better mixer, when my old get completely broken but OTOH, the sound quality anyhow is good enough to reach good consumer quality that is better, than what my Terratec EWX 24/96 are able to record. I wish to get a good sound card, but this Behringer might be interesting for some people. Note, I never compared a Mackie with the UB2442FX-PRO directly, a friend has got nearly the same mixer from Mackie, and I've got the impression that the sound quality of the Mackie is better. IMO Mackie is some kind of reference for low cost home recording equipment. Things should sound similar to a Mackie or better. I'll start reading http://www.google.de/#sclient=psy&hl=de&source=hp&q=RME+FIREFAC… +linux&aq=f&aqi=&aql=&oq=&pbx=1&bav=on.2,or.r_gc.r_pw.&fp=5a4a001e44ffdadc now. Best, Ralf