they all look pretty good i'd start looking at reviews and checking prices
i'd let my wallet guide me if that is the three i had to choose from as
they all will be good preformers. chaintech is pretty good not asus good
but i had a few of there older boards they work just fine.
if your building your computer from the ground up take your time
picking your case and make sure it will be big enough to fit your board
those are full size boards so dont pick a mini-atx case.
antec makes good cases also i've seen a lot of foxconns that are nice.
also make sure you get a atx-12 and not the older atx, 300watts or better should do the trick.
heat sinks are a must! make sure it can cool your cpu and has a good quality fan.
if the case will take extra fans make sure you pick some up.
low flow, low rpm is good if noise bothers you but for me i like'em blazing fast.
i keep a 7500 rpm on my cpu and a 5000 for the rest and it is loud but im use to it.
now adays i can't sleep with the computer off.
If you are going to use the IDE ports make sure you get you some
rounded cables, also get a rounded cable floppy if you plan on installing one.
if your looking for speakers check out cyber accustics they are cheaper then
most but they have excellent sound.
i bought there CA-4100's about 3 years ago for 50bucks. they are 4.1 30watt total
the one's they sell today are 45watt and cheaper still.
http://www.cyber-acoustics.com/go/t...coustics&category=Speakers&model=CA-4100RB-us
they have great sound and the bass thumps for such a small sub 4'inch
in fact my other system has a 6inch and 100watts total and it can't compare.
you might be intrested in a 5.1 or better set but in my opinion they are'nt worth the money
i have no plans on buying a new pair of speakers for some time to come.
keyboard & mouse i use a logitech wireless one (non optical) there are
so many models idont even remember the one i have but it works pretty good about 15ft range.
if your going to add a burner to the system i suggest a plextor drive
they cost a bit more but you can't cheap out on your burner.
if you need anymore help just ask but again i'd advise you to check out
toms hardware it's always my first stop.