Poor quality video output

Hello to all as this my first post, I'm kinda hoping I can call upon the wealth of experience here to help sort out my issue as I really need your help.
Ok, here goes...
I produce architectural animations in 3dsmax, each frame is rendered out to targa & jpeg format as high quality stills @ 1280 x 720 resolution. For the simple stuff I have two passes, beauty and AO which are composited in Autodesk Toxic before being passed onto premiere CS4.
Now when I import the still sequences into premiere and add the titles and effects all looks well in the rendered preview, when I export to media encoder the video looks just awful with banding, fuzziness and artifacts a plenty.
I am not an experienced user, I've been stuck in at the deep end and i'm sinking fast. I've tried pretty much all out the format presets with limited success but have been totally unable to the the final output any where near the still quailty. I'd like a high quailty output matching the still resoultion which can be burned onto DVD and played on computer and through a DVD player.
Can anyone point me in the right direction or tell where I'm going wrong as I'm tearing my hair out with frustration and I'm already two days late on this.
Yours hopefully in anticipation of some helpful advice
Roy

Ok, having checked, the DVD requirement has been dropped which helps me a little, now the only requirement is to play on a pc connected to a large screen tv via HDMI.
So far, with the help from this forum, I've managed to export the sequence, in 1280 x 720p @ 24FPS to a bluray format which has an M4P extension. Despite installing the required codecs I can't play the file on the PC. Does this need further conversion? If so would this need to be done in Encore or another porgram?
Again, apologies for the endless questions but I really am up against my deadline here so any help & advice is very welcome.

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ATR,
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Video Source Properties as obtained from the Timeline:
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One of the principle of goal setting is to "Begin with the end in mind". In this case it'll be very hard to give good recommendations because the end is not defined. So I'll just make a few assumptions and you can correct me as needed.
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Sound like your audio settings are fine, especially for Internet delivery.
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Best wishes,
Adninjastrator

Poor quality video output

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