You can get a pretty good deal on a used HX 40, as a matter of fact I have one for sale with the downpipe. As far as a 62/12--??? I have never purchased one. I currently have a BD super B special and really like it, but have never used a bd super b turbo. (one is smaller than the other). IF you were going the 100 hp stick path, I don't know that i would go with the super B special, I have never ran that combo, but with my 150's they work pretty well together. Just do some searching through high tech turbo, pdr diesel, and a few other websites, you will get to know the turbo prices pretty well.