Elder Scrolls is always best on PC, but way more people have consoles. I just hope they (BGS) don't ever forget about their PC roots and keep the PC fans happy :). I know I have been happy with all of their games, but I hope in the future that's the case too. (I know it will be for Skyrim). Basically PC > consoles when it comes to TES, but consoles > PC when it comes to cost.
I'd recommend if you have a 360 and a pc you can upgrade; get Skyrim for the 360 first, then upgrade the PC and get basically a second game a year down the road with higher res texture mods etc.
It will be great.
Me personally, CE for 360 and GOTY for PC down the road. Can't wait to have my mind blown twice.