l0rdtr3k: I must ask,is the DX:HR that good?because I'm a fan of the original DX.
My opinion - it is great. I am a huge fan of the original. I was skeptical about HR at first, but I ended up loving it. The cover system works great for both stealth and combat. Takedowns are very satisfying. The biggest reason I loved DX is still present - the freedom to accomplish objectives however you choose.
There are a few things to nitpick at, like boss fights that just don't really fit in to the DX style of gameplay, but stuff like this is small, and doesn't prevent the game from kicking ass.
Personally, it is one of my 5 favorite games ever, right behind the original.
The Missing Link DLC is pretty good, too. But regular price for it is a bit steep. I'd wait for the DLC to go on sale before buying it.
edit - apparently the Steam sale starts in like 10 days. I'd definitely suggest waiting for that. You will probably find the game for 75% off during the sale.