If anyone is considering the Anakin because they want a blue blade, remember - the Obi Wan is about 10-15% bighter and more evenly illuminated. It is easily the highest quality blade MR has made yet, which makes sense because it's also the most recent!
Also note that the Obi hilt is very solid and heavy, which I personally love. It just FEELS more like a real Lightsaber and not at all like a toy. The heavier hilt also helps prevent unwanted clash sounds; with the lighter Anakin, just playing with the saber, spnning and shifting from hand to hand can easily trigger a clash - the heavier Obi pretty much ONLY clashes when you really whack something hard.
Of course, if you want that classic Anakin hilt, it's the only way to go.
Also, as Master Yoda pointed out, the current sale Fry's is having at $68 (with free shipping) is really cheap! It's worth picking up one or two Anakins as fodder for conversions and mods.