Building new pc dilemma.

I already own a 710x3 4870 1gb 4gig 1066 ddr2 pc. My wifes pc messed up and I gave her my build so I could buy me a new one. But looking at how technology goes and always having to keep up to date I have reached a point where I dont know what to do. I am a gamer a 23yr old gamer. All I do is game on my computer. But is pc gaming all about graphics? I dont want to upgrade again and again just to game. So should I just buy me a xbox360 and a new TV on black friday and save my money until next year and upgrade my curent pc? Do I really need 2 when I already have one and all i wana do is game? What other advantages can I get from pc gaming then just graphics? I know I know graphics will always look better on pc. But with a current computer that I have should I getme another one?

Well you can share that PC(Cuz all you do is game)...

About the Gfx:
That's your own preference.
Though I have a 9800GT and i can play all games at 12X10(Monitor's native resolution)
but I will be fine if I have to play at 800X600.I upgrade PC in 3 years.

If you care about Gfx then you will have to spend money...