As an xbox user i would say buy a PC. Though PC gaming isn't always a bed of roses. It's all well and good for people to turn around and say "get PC because of mods"...There's more to it than that,and they know it. Console's are easy to use,put the game in and off you go. PC gaming though better, is different. There are times when you need a little bit of patience. Not all mods are compatable with each other,some enhance your experience,some don't agree with your system. I used to play PC games a long time ago,and it's very enjoyable,when thing's run smoothly.
Overall,i'd say get a PC,it's a no brainer really. But it's not always as straight forward as console gaming,especially if you're new to it. There's always help out there,don't get me wrong. You can have problems at times,you can even see that if you look on these forums about tech issues etc. But please,bare in mind i don't want to put you off,i'm being realistic here. But as i've said the PC option overall is the best option,because it gives you more options,and better graphics. I try to be fair when advising people ,they should know the up's and downs.
It's all down to you at the end of the day,are you patient,are you mad on better graphics and mods? When everything runs fine PC gaming is great experience,no doubt about it.But i think advice should be more than just ,yeah get PC because of mods,there's more to it than that. If money isn't an issue go for PC,because you'll learn as you go along anyway,and as i've said,you do have access to alot of options.