let's put it this way. I have an antec sx1030b w/ enermax 431watt ps. I've put a couple OC'ed p4's into lesser cases with lesser 400+ watt power supplies and noticed that they don't cool as well. moreover, they suck to work on.
if you want a case that is cake to work on, get an antec -or better-. the lian li, IMO, is a wonderful alternative to the Abrams tank of a tower antec produces. my father has the pc-65 and i do like it. It is a nice little case if you want to light up the inside, and most components are easily manipulated. I dare say that my antec is a bit easier to work with, however. once you get the rails on the larger drives, and the HD's screwed into the cages, you can throw away your screwdriver.
the newer lian li's have a metal cage surrounding the intake filter, fyi. I like that a bit more than the plastic one. also, i absolutely love the fact that the lian li cases come with blue led's. it just looks classy with the nice aluminum finish. now about some of the tacky front bezel tops...
i believe between my antec case and the enermax i'm using, (not counting the original power supply), my setup cost around 150 bucks. keep in mind that this power supply is 80+ and i bought the antec tower 2 years ago for 110. currently you can buy a ps-less chieftec version of my tower for around 50 bucks. same OEM manufacturer and all. so you find less than a 40 dollar discrepency between two good options in cases. I say blow the money on what really appeals to you. my setup is a testement to the fact that while you may buy a new mobo/processor once every year or so, you'll be using a good case for many years to come. get what you like, and just swap internals as you upgrade. you won't be sorry.