Pentax K7 or Nikon D90?
Can't decide. I have no investment in either system, never owned a DSLR but I use my sister's Canon on a regular basis (it's a Rebel and I don't like the feel of it). Price is very important, I'm a student. Also suggest some good glass?
Chevy or Ford?
Srsly, doesn't matter much. You should buy the 1 you feel most comfortable w/.
50mm f/1.8's a good lens 2 start w/.
If all you want is still photography then both are very nice and capable. There are more and often somewhat cheaper nikon autofocus lenses on the used market. The pentax can use old k-bayonet manual focus lenses of which there's a very big supply and often for incredibly low prices.
I'd go for the nikon but I'm prejudiced, always liked the way nikon engineers design a body
Humm.Looks like you'r sister is a rebel. So she uses a canon rebel.lol
anycase D90, Ranked 1 of 141 nikon cameras --
or a Pentax… Well your choice… You want best or near good (not even near best)…
Nikon. Nikon makes the best small-format SLR lenses on the planet. After that, Canon. Canon makes the best images sensors on the planet. Stay away from Pentax, Sony, all the other newbie entries into the SLR market. They aren't as high quality. Between Canon and Nikon is basically a wash, everything else is trash
Clegs is talking bollox - Sony & Pentax are not newbies in the market - Pentax have been around donkeys years with film SLR's and so have Sony (under Minolta name).
You ought to see if you can try out both models somewhere (camera shop?) to find out how they feel for you (you said you didn't like the feel of your sister's Rebel, & how the camera feels to you IS important). IF you can test them out, then check weight, balance menu choices, button positions, that kind of thing.
I know more about the Nikon range than Pentax, not having owned a digi Pentax (had an old film SLR Pentax though) and can say that the D90 is a good spec - not an entry level Nikon by any means - has a focus motor in the body so can take any Nikon Af lens. Also has Nikons wireless flash control system (CLS).
As for glass - as you are new to the DSLR world, I'd suggest staying with a general purpose lens to start with (18-55mm or 18-105mm) until you feel restricted by that sort of lens. By then you will know what you need (ie faster lens, different focal length range) and can plan accordingly.