Cubase
Cubasis is Steinbergs entry level software that usually comes bundled with a soundcard,{sounblasters, etc} and Cubase is their "Pro " software, currently their are about four versions out ranging in price from about 400 to 700 U.S. I currently run Cubase VST 5.1[$400 U.S] Along with an ADAT on a 900mhz PC and two 7200rpm drives and I get about 32 tracks with about 2 dozen effects going, I love it.