Complete Rear Suspension / 12 bolt + more

[6D9 Matt]

I am in the process of installing my 6-speed, so what the heck, might as well start planning the next mods, right?!

In the fall/winter, I plan on beefing up the suspension and rear end (dropping in a big block next yr w/550-600 rwhp). I am going to be minitubbing the car at the same time I will be putting in this suspension and rear end (seemed logical). The car wont be doing any autoXing, and might make the drag strip once a year, if that. Once I get the ride height/comfort I am looking for, I probably wont be messing with it much. It is mainly a cruiser. Right now the suspension is pretty much stock with monoleaf/air shock rear and a 10-bolt.

Here is are the two options I was looking at after searching around a bit:

1. DSE minitub KIT (tubs, 2-3" rear leafs, shackles, etc) - which I would also be purchasing new shocks as well as a narrowed fuel cell (im seeing is necessary with the rear leaf setup when installing minitubs). Then also a complete Moser 12-bolt rear end (33 spline, 3.73's, etc).

OR

2. Im hearing if I buy a Gbar or Quadralink, I wont have to get the narrowed fuel cell, and is actually a nicer ride than the rear leaf setup. I would also be going with the complete 12-bolt rear end on this option too. In this option, would I need the full minitub kit, or just maybe the deep tubs since the Gbar/Quad would be relocating my shocks?

Thanks and any input/advice would be great! I know Option 2 might be a little bit more money, but would it be worth it for the extra comfort in the ride/adjustability/handling/etc?