I got a 1.5 steerer fork for my Nomad, in hindsight I think the 1 1/8 would have been a better choice. There are many more stem options for 1 1/8, you can run offset headset cups to change the head angle of the bike and it will work in any frame, 1.5, tapered, 1 1/8 or any of the new internal/integrated standards. If you don't like your new tapered fork it could be harder to sell because it wont work in a 1 1/8 frame, or a new frame might require you to buy a different fork if you just wanted to swap frames.
I would never buy a tapered fork(unless it's a ridiculous deal) just on the principle that it is a new standard that fixes a problem that does not exist, like the QR15 standard.