For males:
My guess would be that the Dervish Obs Armor is some kind of dark and moody full Robe with lots of golden religious symbols littering the surface of the fabric.
Something like this, minus the huge mask:
http://www.linkandpinhobbies.com/h_ra.jpg
The male Paragon Armor, i see using the same style as the male FoW Armor. I allways thought it looked somewhat egyptian and i wouldn't be surprised to see some semi Stargate Rip Off.
Not that it would be bad in this case.
For females:
The female dervish armor. Hum. Will be a full body robe with the exception of "small" gaps in the clothing at the bottom and the breasts :P
Female Paragon Armor, well well. If you want to get an early impression of THAT one, you should head over to your local beach, ask one of the beautys to take her top of. Substract 90% more clothing and you will have the female Paragon Armor.
Sorry, couldn't resist :P