Im sorry to counter the above two statements, Depending on what your planning on doing. If you just gonna leave it stock, Get tm, HOWEVER most ppl dont settle for stock snipers, so if you plan on upgrading it, I would get a knock off, Like TSD for 200 bucks, Cause your going to be replacing all the internals anyways, so why would u pay the extra 300-400 and then rip out all the good stuff? I purchased a TSD for 210 to my door, and replaced all the internals with laylax and seems to be the perfect weapon. Not sure about Tm, Think its in the 350-400 range, but TSD out of the box is 498fps..........
So all depends on what you plan to do with it. Leave it stock then buy TM, Upgrade then buy TSD.
Hope this helped,