The Montare and Mendota were on my short list last year. I bought the Quick CX Ultra (this year, Quick CX 1) instead because it has a top-notch suspension fork. It's even more expensive than the Mendota, though, and I had to stretch my budget.
It's been the right move for me, for sure, because I ride MTB trails about 1/3 - 1/2 of the time on this bike. The front shock helps a ton. However, on-road, I only use the shock every now and then... I'm usually locked-out.
If you're set on those 2 bikes, I'd get the Mendota if you will be on-road 90% of the time. I'd get the Montare if you are doing at least 25% dirt. If you're over 25% trail riding, consider a 29er instead or check the DS series to see if they can mount a bigger tire. My uncle rides a bone-stock 2011 Kaitai about 70% off-road and I'm doubtful he can get a 2" knobby on it. However, he's done well with the stock cyclocross-ish tires, and I think if he gets a 35-38mm aggressive knobby he'll be fine.