I don't do HD so can't comment there... but for SD, any camera that saves to memory or dvd or drive is going to use a compressed codec that will not edit well in Premiere
Tape based DV is still the best for SD
For a Firewire DV Camera - look at Panasonic PV-GS320 or GS500 (Note that I have not used either, but they have good reviews)
I second John's recommendation on the two Pannys for inexpensive, outdoor SD work. Both are 3 CCD designs, and that is very rare at their price points.
Buying a new camera is a thang full of hope and promise, kind of like when you buy a new editing system. There are so many options and possibilities that it can be seem overwhelming. If you choose to edit using Adobe's CS software please respect that Adobe does not support all camera models. Do not 'rush' out and purchase a camera until you do your homework, it would be terrible to own a shiny new camera and discover that Adobe doesn't support it's use. Contact Adobe Tech Support or query the 'Knowledgebase' to locate their 'listing' of camera models that Adobe 'supports'.