Any carbon frame which holds up to the rigors of hard training and racing should also hold up to frame packs and touring IMO.
Apidura is highly regarded and that's what I'll likely put on my carbon RLT 9 RDO for light touring.
Keep in mind that the Warbird has five year frame and three year fork warranty. All Niner non-carbon parts come with a two year warranty while carbon parts come with five.
Both the RLT 9 and Warbird have similar chainstay length, wheelbase and bottom bracket drop. Neither are terribly racy but the Warbird is going to come in lighter and that's why I think it is marketed as a racy bike while the RLT 9 steel is marketed as an all day adventure bike. Either will likely be a great bike but you pay for less weight, and the Salsa mystique IMO.
You might want to look at a
Jamis Renegade Expert. Similar geometry to the bikes above, 105, hydraulic brakes, centerlock hubs, 12° flared bar, fork mounts, 21 lb, $2699 list. The best value today might be
Jamis Renegade Elite. It has an amazing parts mix but is $3899 list. Not sure what actual street price is on these.
-Tim-