Settings for working with Canon DSLR 1920X1080 on FCP 7 Help!

I'm having a hardtime to choose the appropiate settings to edit material from a Canon DSLR T4 first settings that I chose were: Frame size: 1920X1080 ASPECT RATIO: HDTV 1080I (16:9), PIXEL ASPECT RATIO. SQUARE ANAMORPHIC 16:9 (UNCHECKED) EDITING TIME BASE: 29,97
QUICKTIME VIDEO SETTINGS COMPRESSOR: H.264 QUALITY: 100% AUDIO SETTINGS: RATE: 48 KHZ DEPTH: 16 BIT CONFIG: CHANNEL GROUPED.

These are the settings for my sequence; but as soon as I import a clip it looks not so well defined on the canvas, it is no so detailed as it is in the viewer. What am I doing wrong...Hope you guys can help...I need to finish some projects in HD.

Best regards for you guys from Mexico!!!