JP Jr... ... .
I can certainly understand your thoughts after doing a search on this subject and will offer my insight and try not to be biased toward any of the others made. When I had major troubles with mine in my 98 last year(Chrysler's at Carlisle week, of all weeks for it to fail this was not needed to happen then)I began my exhaustive research and way to many phone calls to to even count(of course you could count the knots on my head after Mrs. Hammer seen the long distance bill,LOL). All the prices for the ones you listed and the EEP Double,which I chose,were within a $100 of each other. They all required the larger input shaft(more cashola) and when all was said and done were near the same price installed. One thing to add here is it is NOT CHEAP,period,for any of the doubles.
My choices came down to two at the time,the EEP double and the SBC double. SBC has a customer service record that is second to none and makes a quality unit. Peter just couldn't get the required input shaft for me in time or it would have been in. I have driven one of his competition doubles since and other than not rattling as bad as mine, it held in the truck I drove. Engagement was smooth and flawless with little effort,pedal pressure was about the same as a stock unit.
As I said before,I chose the EEP double and did it for two reasons. One was how quickly they could do the job and the second was due to Sled Puller. When I thought back to how much punishment he does to his truck and street drives it with only pulling the clutch down once to update it,that sold me. While he was destroying every other part of his drive-line the EEP performed flawlessly and didn't fail,it was enough for me to make a easy decision. As fickle as I am with my truck EEP took good care of it while doing the job. I had completely detailed it top and bottom for the show before going out and when Ryan finished the install you couldn't even tell he did it. Made my job alot easier,then all I had to do was drive home in a monsoon and re-detail the top for the show the next day. It has been in a year and taken everything I can throw at it on the street and has NEVER failed to hook when needed. I can't vouch for the sled pulling deal,my truck is allergic to dirt and as for drag racing,not,diesels are way to slow for me to do that with it.
Obviously its your choice here and they all are comparable units. I will be in Muncie if you wish to drive it,you may,just NO adventures thru the mud

. If you have any other questions let me know and I'll PM you a way to call me. Good Luck and hope this helps... ... ... ..... Andy