Welcome Raven_pc. So very glad to hear you made the switch, and even glad.....er to see you're diggin' it
Linux is cool, ain't it? It's just teh beginningz.
As for your ALSA issue, how did you try to get ALSA to work? I've had sound troubles myself when I was using Ubuntu. I had onboard audio and wanted to use the Creative Audigy4 I'd just paid $80 for. I thought it would pick up automatically... I thought wrong. After some forum posts and consulting the great Google, I've learned a bit about ALSA.
First of all, make sure you're using the latest version available. As root,
#apt-get update alsa
After it's all updated and still as root,
This'll bring up an Ncurses-type menu and will pretty much walk you through the whole thing. Choose your sound output, say yes, and away you go. Once you're sure ALSA is set to use your device for sound output, as a user,
Put up each slider and listen. But don't wear headphones and put up each slider. I had ringing in my ears when I last did that
Hopefully this helped some. It could also simply be a matter of your hardware being too new. Brand spanking new hardware and Linux usually don't go together well, because hardware manufacturers don't put too much effort into drivers for an OS that 1% of their user base is using, and most Linux compatible hardware is made so by those active in Linux kernel development. From the sounds of it (Nvidia 9 series video, blueray, and 1080p screen), your mobile rig is quite new. If ALSA doesn't work, you may simply be forced to wait a few months, or undertake a hobby of Linux kernel development. Anywho, hope I've helped somehow.