Can't encode quality Web vids from Premiere CS4

[MAtkins]

Hi:
I'm using a Panasonic HDC-HS300 High Definition camera. I'm shooting at it's highest quality 1920x1080i setting. I bring that file into Adobe Premiere CS4.
I need to crop the vid then resize it for Web use (about 320x240).
Every time I export from Premiere I get a very low quality video. I have a competitor who has the same size vids as me and the quality is superb.
I cannot figure out how to get anywhere near the same quality.
Here is a link to show what I capture from the camera and what I end up with.

Please let me know what I must do to get good quality vids like my competitor does.
http://www.sizzelicks.com/vidproblems.htm

[Baldrick]

Please do NOT cross post. https://forum.videohelp.com/showthread.php?t=317547