Hi all sound experts ! What is the difference between a medium budget interface and a "state of the art" interface ? Is the sound so enormous better in a Prism ,Apollo , Lynx for ex. If you compare these with Motu .RME and others for about 1500 US dollar . I am a newbei with studio stuff so I bought my Motu UltraLite mk3 Hybrid on recommendations . I´m pretty satisfied with the sound quality . But I´m saving money to buy a "really" high quality interface . I have very good ears . So when I bought my first studiomonitors it took a long time of listening before I found my "dreamspeakers" : Dynaudio BM5A MKII ( I couldn´t afford Dyns higher level ) . But I fell in love with their sound . Where I live (in the countryside in Sweden it´s almost impossible to have a chance to listen to Prism and the other high end interfaces , but when I buy a new I want some "really" good one, that also have better drivers for PC than Motu has . But the sound and converters is (so far I know) the most important. What else is important ? I´m making electroacoustic music with a mix of sound I´ve recorded and vsti . You can hear my music on my website : Home - Cajan Music My setup is just now : Windows 7 Ultimate 64 bit SP1 . i7 2600K 3.40GHz . RAM 16GB .Motherboard : Asus P8Z68-V PRO GEN3 . Graphiccard : Gigabyte Geforce GT 520 (Passive cooling). 4 Harddrives : 1: SSD 120GB (OS+programs). 2: Western digital (SATA) 700 GB for sample library and vst fx . 3 : WD (SATA) 1TB for projects . 4 WD (SATA) :storage drive . Audio interface : Motu UltraLite mk3 Hybrid (Firewire) . M-Audio Keytsudio (the cheapest one ) . REAPER , Audio-Mulch , Sibelius 6 , NI Komplete 8 . EWQSL Gold + alot of freeware vsti and vst effects (they have ofter a very interetsting sound to manipulate) . My goal is to upgrade to a studio computer . So if anyone have any advice about how to find a high end interface , I would be very grateful .PS. I have only composed EAM music for 2 years , so I know very little about studio stuff DS.