You've come to the right place
Rob Thomas has nice stuff, but he's as high as Banks.

(just funnin' ya Rob)
The difference is that I won't hesitate to buy or recommend Rob's stuff. And while Banks stuff has always been overpriced--I lost all respect for Mr. Banks and his outfit with the last ad he put in TDR. He slams every other company out there--calling them "hacks" or such. What a scum thing to do. Don't mean to re-direct the thread, but I had to say something about him.
I have parts from: Wildcat Diesel, City Diesel, PDR, TST, Big Exhaust, Edge, Diesel Dynamics, Rob Thomas, Geno's Garage, Blue Chip Diesel, Enterprise Engine Performance, South Bend Clutch, SunCoast Converters, and more on my two trucks (can't give up ALL my secrets)

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With a little guidance, anybody can make the same power with less $ than a Banks setup. Especially if they will buy some used stuff. With relative safety too.
ON stacks, many of us get used stuff out of the big truck salvage yards. Others plunk down the dough. I haven't done mine yet.
Mark Craig doesn't do stacks.