@ Mar, I've run both Intel and AMD chips. They're functionally equivalent. Occasionally one specific line will be better than the other's offerings; but I've had minimal issues with either.
On board video, no matter what, does not play well with LoTRO. Try to get the best addon card you can afford. I've run ATI and NVidia (and some of the licensees that also produce cards) and I've found that the drivers matter more than the cards. I've had a few more problems with Catalyst drivers than I've had with the GeForce ones. YMMV as they say.
Right now, my card and disk are the limiting factors in my system; yet I don't lag unless I have network issues. I do get graphic performance issues if I try to push my system; but that's not a Turbine problem. I missed a big SSD sale and now am stuck since the family had to get a newer automobile. We're in the sticks and reliable transportation are a must. Feet work; but 10 miles to town is a bit much :P. I'm waiting for the next SSD sale and hoping for a sale on 550 or better NVidia GT/GTX cards.
I'm also looking at getting another power supply and a better motherboard and processor combo if I can get a good sale price.
"No sadder words of tongue or pen are the words: 'Might have been'." -- John Greenleaf Whittier
"Do or do not. There is no try." -- Yoda
On planet Earth, there is a try.
Indeed, in a world and life full of change, the only constant is human nature (A is A, after all :P).
We old vets need to keep in mind those who come after us.