Best way to go about recording a band yourself?

I have a lot of audio/video knowledge—enough to know my way around things and then some. Though I’m only now getting into complex recording. I do use Audacity and whatnot but I want to get into DAW’s and Music Sequencers to record numerous instruments and track some CD’s.

I have most access to Windows PCs at the moment. What I’ve researched thus far is Ableton Live, FL Studio, and Sony. I have purchased an audio interface (Saffire LE) to connect to the PC through FireWire but need to know about what software to use.

Does anyone know the best software for recording? Cost is not an issue. Also let me know if I’m missing anything major; all I need is an audio interface and software correct?