Logic said:
I'm currently using the Sony P-8, which is 3 mp, I wanted the image quality to be higher resolution (looks really cool on a big plasma tv with higher resolution).
televisions have only about 480x320 resolution, so your camera currently has greater resolution than can be shown on a tv, no matter how big. HDTV does make this better, but even then the change isn't big enough to come close to tapping your 3Mp camera. Your camera's pictures will look just as bad as an 8Mp camera on a tv. The difference is only noticeable when you go to print. A 3Mp can drive an 8.5x11.5 image at about 240dpi (if I recall correctly), a 5-6Mp can drive a 13x19, and an 8 can drive even more. However, I've seen a 3'x5' poster generated from a 3Mp camera with attention to the PhotoShop enlargement process (by 10% increments only) that was so good you'd have to know the subject intimately to know it was a huge enlargement.
Different cameras will have different colour profiles, different features, different weight, different attachments and different resolution, but unless you wish to go pro or make some extremely detailed enlargements, 3Mp is adequate. I'd pay more attention to the other areas and leave the pixel envy for those with a lot of money to burn.
I don't need a huge memory card (256mb is fine) because I'll bring my laptop with me, I can just transfer pics to that.
Just FYI: I have a Canon Digital Rebel which is about 5-6 Mp (can't remember) and I can get about 150 or so pictures at high resolution onto my 1Gb card. If you are shooting 8Mp onto a 256Mb card, you'd be lucky to get 15-20 pictures before you have to dump it to storeage if you're shooting at high res. Most videos are typically in the range of 1Mb/sec and up, which will also cramp your style.
I don't make any money selling pictures, but I've made a pretty serious hobby out of it.
gotcha. That's about what I'm doing, though I sold my first picture a couple weeks ago (yay!). In that case, you may chose to have one serious camera which allows different lenses, external flashes, synch cords, manual focus and manual time & aperature controls, a very fast response (<150ms), RAW mode (not just JPEG compression), synch speed of <1/250 sec, and Adobe RGB colour profile. I'd consider the two major dSLRs: the Canon Digital Rebel and the Nikon D70.
Then buy a second camera for movies, quick pics, and portability - something to slide into your jeans pocket and bring with you where you wouldn't lug the bigger, beefier camera.