IMac to component HDTV?

Situation: I hate Comcast. I have a new LCD HDTV that has a built in HD tuner and now I can pick up all my local HD channels with only basic cable! Score! $14.99/mo! Sweet. NOW HERE IS THE ISSUE: If I do this, I will not be able to pick up HD on my old Mitsubishi 1080i HDTV (set up in my home theater, no HD/digital tuner and has component video input only).
I plan on putting Miglia TVmini HD on my iMac core 2 to pick up the HDTV, very nice and easy! I am thinking, instead of buying a stand-alone HDTV tuner for the Mitsubishi, I would hook my iMac to it as a secondary display. HOW would I make a video connection from the iMac to the Component video of the Mitsu? Second Q, what about the audio for my bose system? Any thoughts?????

Hi kwandrews,
Connecting your iMac to your TV shouldn't be a problem.
You need a mini DVI > DVI adapter (http://store.apple.com/1-800-MY-APPLE/WebObjects/AppleStore.woa/wa/RSLID?mco=6C0 4E07A&nplm=M9321G%2FB), a DVI > Component adapter (like this: http://sewelldirect.com/dvivideoadapter.asp) and a Component video cable (like this: http://store.apple.com/1-800-MY-APPLE/WebObjects/AppleStore.woa/wa/RSLID?mco=149 730D6&nplm=TL953LL%2FA).
I am unshure of what resolutions you will be able to feed your TV with, however. Maybe someone else has a similar setup that can share more info.
Audio isn't a problem either. Your iMac has a analog/digital combined audio output. Depending on wether your Bose system can take a digital toslink or an analog signal, you could use this: http://store.apple.com/1-800-MY-APPLE/WebObjects/AppleStore.woa/wa/RSLID?mco=6C0 4E099&nplm=TA968LL%2FA or any minijack > RCA cable, really. Analog cables won't support surround sound, though.
Hope this helps!
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