Well...I didn't see any spec's. on it.....I would stick with a Phase IV at the minimum....check out the ENCO catalog or online....they spec. the concentricity, flatness and such.
At 129lbs it will be a pita to handle and you will need a big mill to use it on. It's really a super spacer and is optimised for fast repetitive production work. You could buy a H/V rotary table plus a dividing head for about the same price and have more versatility, all be it at the expensive of speed for some operations.
I agree that you should stick with Phase II though, or at least some reputable brand. If you are paying all that money, you might as well be assured of the tolerances.
ya now that i think about it you all might be right definatly words of wisdom enco has some nice looking tabels i might do that insted thanks for the help