^^^^^ hey bro...I dont think there's really much of a big difference between a D50 and a D80. You might want to look in to buying a D90 just for the body. I dont know what kind of lenses you have at the moment but try looking into the D90. IMO the fisheye lenses are fun to use but its not really something that you can use all the time.
as for spending $600 im pretty sure there are some prime lenses that go for that price. maybe a 35mm f/1.4 and or an 85mm f/2 or so i dunno. lol. I'm looking in to upgrading my D40 to either D90 or a D200.
I finally got CS3 and got rid of CS2.
I'm not sure if its just me but I re-edited some of the pictures that i've taken with CS3 (mostly my panos) and they look at lot crisper and clearer compared to the ones that I stitched with CS2. I dont know they just align better and lighting seems to be better with CS3. Some of the panos ive taken wont even stitch with CS2. I was surprised when I loaded the ones that i took freehand with out a tripod and CS3 was still able to put them together.
I got a question...anyone here PS their pics a whole lot? is that considered cheating?
Well i use PS mostly for saturation, contrast, and blur etc...and a couple of plugins like neat image, focal point and focus magic.