After getting rid of the Kifaru Marauder I ended up buying yet another pack hoping that it will be better than Kelty. I got TADs 2nd Gen FAST pack. After testing it around for about a month or so I have to tell you that Kelty is still winning. I'm back with Kelty and will not mess around with other packs anymore. You know my opinion on Marauder. And here's one on TADs: great pack but too small (had to expland it with additional pouches), hard to get to compartments, comfortable, few gizmos (like retractor hidden in the pocket compartment) but in the end not as good as Kelty. Map 3500 is very roomy with multi angle access options and maybe it doesn't have as much webbing as I want to it is a workhorse and a great bag that is not only comfortable but very well made.
I got a lot of complements on looks of TAD pack and Marauder. People love that tactical hardcore look but in the end all my coworkers begin to love the capacity and put functionality over looks.
Here are few pics of what I did to the TAD pack:
On the bottom I fitted a Kifaru pouch, another one went on the side and one more in the front. That gave it very tight capacity of maybe 3/4 of the kelty and it was impossible to get to. One thing I loved about TADs pack thou was the outside sleeve for a rifle/snowboard/laptop which made access to my computer fast but than it took me forever to get to the charger.
Go with the Kelty man.