either the perp or demo. the commencal, giant and iron horse are all good bikes but id go with the perp or demo

its between the perp and the specialized. weigh up price vs. parts but both are nice with commencal in 3rd , but too light duty compared to other 2. theres something about the demo that says whooooo!!!
your predicament.........

the commencal i have an absolut and i love it they make dirt jumpers nice and lite and there fully are much heavier than the djs acording to there site

commençal and giant don't have chain guide. then we have 3 to choose if i was u i chosed ironhorse

ide take the commencal out of this...but its really between the demo and perp they both have same forks(best single crown on market) Demo is a better dh bike/and also rated best FR bike of the year and will last longer with stronger componets so demo wins hands down..

For dh and fr the demo would be good at both

demo.....iron horse.....or giant....Giant probly have the best specs for their price range