HDMI vs RGB for TV input?

G'day,
at present have my macbook hooked into my 42" Pioneer plasma through the s-video lead, this is fine for itunes etc but not so cool for reviewing documents (or writing my thesis) have mucked around with resolutions and zooms etc but i still want a clearer picture. As with most new TV's i have a miriad of options to plug god knows what into the back of the tv - but which is best?? intuitively i would go with the RGB - looks like it should be attached to a computer;), but would the HDMI be better?? (what is HDMI anyway?)
i'm assuming whatever i do i still need to get the mini DVI to DVI adapter?
Regards
Dougal

It's worse, with macbooks the DVI is a digitial interface (digital signals). In order to do RGB it needs to be converted to analog, this conversion process results in some loss. If you were to go DVI->HDMI I believe that would result in the best picture possible.
To be honest though, I have a 40" Sony Bravia LCD and I hooked my macbook up to it and I coudn't really see myself using it that way for normal everyday computing. DVD's or Photo slideshows it's good but I couldn't find a happy medium for working efficiently with it like that.
Steve
White MacBook 2.16 1GB   Mac OS X (10.4.4)  

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