How much are you willing to spend on a PC? If your going to spend the same amount go with the 360. If your willing to get a nice PC go with the PC...at 400$ a PC is worthless...
Depends on how old your pc is. And how bad. f you want to lay out the specs for me I could give you a definitive answer on what to do, And how much you are wllling to spend on a new computer. If you get 360 remember you aren't just buying a 360. You need to buy a bunch of games, probably a second controller, and xbox live membership for it to be worth it. There are a lot of factors but just tell me your pcs specs, age, and how much you'll spend on a new one I will tell you your options!
It dpends if you have to spend money or if it is like a free giveaway sort of thing. If its free, you have the ability to get good internet, of course choose a PC. If not on the internet choose an Xbox360, you won't need internet.
My house has a lot of computers but no Xbox 360, so of course i am going to choose which i don't have . PCs are vulnrable to TONS of viruses, so you are going to need good anti-virus software that updates itself too ( I use windows live care, best stuff ever) An Xbox360, i don't know much but i do know of one virus on the xbox360, the red ring of death virus, it completely breaks too, and you can't protect it from happening ;(, so i choose a PC if you are worried.
a new pc can put you back sometimes more then $5000, and an xbox $350 (standard) and a pc can last you many years, when the xbox 360 will be obsolete when they announce the new one. so umm, do i even have to say it?
What's the perfect game (or your fav), and with what console do you want to play it? Reply to this questions, and you have your answer Anyway, a console is very limited compared with a pc (maybe a Mac XD).