I love my grainfather. Was able to get an allgrain batch done in 3.5 hours start to finish last weekend due to the ability to have preheated water.
There is a "kock off" by brewers edge called the mash and boil. Slightly less capacity than the GF, has no chiller or pump, but it is $299. May be worth looking at, however, i have not seen one in action.