so:
buy a console, buy a monitor for use with said console, buy speakers
or:
buy console, and tie up your hdtv with games(for a family man this isnt the best option for me)
or:
buy a pc that you can use for tons of stuff.
btw most people dont buy every new grafx card that comes out. you can skip a few and still be perfectly capable of playing all the games out there. my older brother buys used to buy every card that came out and new mobos etc regularly i alway bought used stuff and skipped new and we always played the same games. a frame rate over 30 is a waste as long as control stays the same, a game running at 200fps looks identical to one at 50fps if screen options are all the same.