erm.. quick one.
dv cams can have 1 CCD or 3 CCD's or 1 CMOS or 3CMOS' sensors. These only describe how many sensors the camera have, whereas a SD (standard definition 480lines) or HD (720 or 1080lines) describe the resolution of the recorded signal.
In laymen terms, 3 sensors = better colour, better dynamic range (retaining shadow and bright area details).
Everything is a compromise of cost and performance. There is nothing that is cheap that will give you good colour, dynamic range at the same time. You have to decide what is best compromise now. To buy something "average" to practice your shooting and editing skills until you are good enough at story telling to qualify yourself to use better cameras.
If you're a beginner, you're better off deciding which is a better recording format (dv tape or solid state memory (SD card) or hard disk). dv tape is still used by pros but it's slow to transfer video into computer for editing. (speed is 1x, ie; 1 hour of material takes 1 hour to tranfer) SD card and hard disk is much faster (if you used thumb drives, you'll know how fast).
hard disk recording is sensitive to shocks when you're recording, which might give you some data loss when you subject the camera to excessive shock.
tape media still allows recording of higher data rate at the moment for mainstream (4figure budget) cameras, except Panasonic's P2, Ikegami EditCam, GV's Infinity, Firestor's HDD for regular cams and but not limited to Sony's XDCAM, all of which are more expensive than tape equivalents for now.
Have fun telling your stories!