Cheap places are good, but it is also good to look for sales.
Right Stuf is expensive, but they have some good deals in their weekly deals section, I got Trigun yesterday for $70 cheaper than retail (about $13 cheaper than dvd pacific).
Also just a side note, I post a lot here on this computer at school and I won't BS you, when I was looking at the dates on dvdpacific at the 800x600 resolution it cut off their prices (right after retail)...LOL, anyways, here is the right stuf site in case you want it search for sales:
http://www.rightstuf.com