If you own the Hot Toys Luke, this is probably going to be your best and only option in finding a Darth Vader for him to square off against.
Sideshow's 1/6 scale figures are, at best, hit or miss. I really want this Vader to be as amazing as it looks in these pictures, but there's really no way to know its true quality until someone does and in-hand review. I'll be waiting till then, so no per-ordering this for me. (However if you'd like to, you can do so through Sideshow's site on May 23rd.)
Aside from the looks of the figure, the other thing that has me optimistically hopeful, and even excited, are the lights on his chest and belt. Very cool touches. He obviously also has the removable helmet. The Sideshow Exclusive version will also have severed hand.
He'll be selling for 249.99 (yeeeow!)