Which Nomad to get?
A STD Nomad MK2 or a Nomad MK2 X?
What size? With the introduction of the X series Thorn started adjusting the load carrying capacities depending on the frame/rider size, and this makes a lot of sense. In my experience, the frame strength varies hugely depending on these few extra cm/mm of tube length...
I used to ride the xTc. A fantastic bike but, being XL size, it shook like a jelly with 15kg plus, even on smooth tarmac. Had to replace it with the Raven for a Himalaya trip, which was a good choice (for Himalaya that is, otherwise I really miss my xTc's nippiness). But my partner, who is much smaller and rides M size frame kept the xTc, and just took mudguards off and put 2.0 XRs on. We rode some seriously rough roads in Ladakh, up and down hill, and she had no complaints whatsoever, and the bike handled the load no problem. I carried most of the kit/food/water, but she still probably had around 15 kg on hers, which I guess would be near the xTc limit for smooth surfaces.
So, if you are looking at going lightweight and only carrying 30 kg very occasionally, and if you are looking at smaller/medium frames, I guess you could be fine on the X. If you are a big guy though, this is unlikely to work.
Trailer is a good idea, and frame bags can improve the bike's handling when it would be otherwise overloaded.
Some people will say that you should future-proof your bike and go for the strongest possible frame. Well, I beg to differ - don't get a frame any stronger than you need. Lightweight frames are more fun