Pro Audio Software

I am the owner of a pro studio of music recording, i am also a new user of Gnu/Linux Suse 7.3. Before i used win2k and Cubase Vst 32 R1. I need pro (or similar) audio software (i have seen al lot of software but i don't know wich is pro or not) for my Pc (with 2 RME hammerfall Digi 9652) . I need for example a multitraks hd recording, a mixer with the aux possibility (every misician needs to hear what he plays and what the others play in different channels) and so on until a good software to burn audio CDs. Could anyone help me?