you will not have to solder a thing, everything is sockets and slots.(edit: whoops, he already said that!^^)
and yes, good point there, its important to get a case that flows air well. A cheapy house brand might cost less, but it probably wasn't designed or tested well, and is probably a knock-off.
Here is a case I was considering. A little pricey though.
http://www.newegg.com/app/viewproduc...129-127&DEPA=1
As well as this one:
http://www.newegg.com/app/viewproduc...112-025&DEPA=1
I can personally vouch for this case design. We are using these in building all new computers for the school district. Solidly made, gets the job done. blow hole in the side sucks air into the case (as opposed to blowing it out) which goes direct to the cpu fan. There are still the main fans, one in front, one in back for the standard airflow model. front usb finally, the older versions didnt have that (my current model). negatives are no removable mobo tray, and the power supply is only 350watt. depending on what you are running (video card, number of drives) you may be okay. overall, its a good design, I think.
http://www.newegg.com/app/ViewProduc...116-172&depa=1
This is the case that I bought for my new machine. From what I read, its a good case. Flows air well, using two 120mm fans (big uns). My only problem with it so far is that the metal is warped a little around the first card slot, so the blank won't fit right, but thats minor. It's nice, the company includes a little kit with it that has a screwdriver, a bunch of screws, motherboard standoffs and zip ties. nice touch. no removable mobo tray, though.
http://dealsonic.com/ahx1blknmida.html