I agree with the sentiment of spend where it is important, and go frugal where it isn't. I'm spending big $$$ on the tuner, but on the EGR, the $30 kit will do just fine.
Instead of getting the $160 DPF pipe from Diesel Truck Products, I went with the same thing from Ebay for $84
It's just a pipe after all. I'm putting down $3k on a Carli level kit in July, another $800 to have it installed, and another $2k for 295/65/R20 Toyos this summer. So, got to save $$$ where I can. The EGR delete kit and the DPF pipe seemed like the most logical choices to go frugal on.