Well... everything comes down to Dollars and Cents-- what is your budget??
Personally... I would opt for A PCI-Express motherboard-- as by the time you want to buy a video-card-- VGA will be essentially done (it is now,really) Get as much of the fastest
RAM you can afford.
Ram is the biggest regret for most people ("I didn't buy enough from the start.") Pick what you would drool over right now, and DOUBLE that amount. You won't be sorry.
RAM consumption is unlikely to go down soon.
Power-supply is one of the most over-looked things when building. Again-- what you THINK you really need PLUS 30%-- if you think
you want a 450W --buy a 600W. There's nothing worse than getting all excited over a new upgrade-- only to find out your PS is cutting out due to overload.
Do these 2 FIRST and THEN start adding those dream parts-- even if the budget says you have to wait for that video-card. Build your PC like your house... set a top-notch FOUNDATION first --Then build on it.
Decent quality
MOBO+Good processor+fast
ram/lots of it +topnotch power-supply equals a good foundation
Most
Mobo's these days will still support IDE drives --and their speeds are adequate-- and you will have the option to upgrade to SATA later on.