Another common misconception. My PC cost around $600, I wont need a upgrade for 3 years or so. The 360 was $300 when it came out but on top of that cost you need to pay for live and you're also going to need to buy a computer anyway. When it comes down to it the PC doesn't cost much more than the consoles, although this is assuming you build your own PC which isn't as hard as it sounds.
True story!
Even I managed to build my own computer and I know next to nothing about anything (also true story), mine cost £1000 but that price is only that high because I have a Nvidia GTX 570 graphics card (which was about a 1/3 of the price of the whole system), you won't need one that powerful for Skyrim, I have 2TB worth of memory space (way more than necersarry, I over guesstimated when I built my rig), I have a blu ray dvd r/w (you won't need that), I also have extra cooling fans in my system too (they are optional extras)
I could have built mine for alot less if I had chosen but decided the advantages of a PC were better.
Afterall with a PC you can constantly update/upgrade whatever you want to with it, your not stuck with the same hardware for 6 years. And when the next gen console comes out anyway, it will still be inferior and out dated when compared to a half decent PC because MS/SONY aren't going to put the very best gear into their systems for fear of pricing to many people out of their consoles.
Getting a decnt rig will cost more in the short term but will be better overall in the long run, afterall you probably have PC anyway right for online banking/shopping, keeping in touch with friends, using this forum (so your already paying for the internet). You may as well have spent the extra money you put towards a console on getting a better PC in the first place
Say you have a basic dell PC for about $300-$400 then you got an Xbox 360 for about $250, well if you had put the money from the 360 towrds a better PC that would mean you could have had a PC worth something like $650, which if you build yourself would be equilevent to a $1000 PC because you aren't paying for the priveledge of someone else to buld it for you.
You can then update your PC when you see fit and spread the cost of it rather than doing the whole system at once. New graphic card one month, better SSD the next see where I am coming from. It doesn't have to be the expensive nightmare that you think it has to be, just get a decent PC without going overboard.