for the Enchanters, the 1.5k stuff get's dyed completely, while the 15k stuff get's everything but the lace dyed (which is not a problem if you want to dye it black, as the lace is black anyway.)
I also agree that Enchanters is not as beautiful as the Courtly/Noble and the Rogues armor, but it does give the most useful benefit. (energy) The Courtly/Noble only gives the + to armor when you're casting, but since mesmers cast so fast, it's almost useless. The Rogues is useful for some places, but the armor boost is only against physical. Since the Enchanters gives energy, that would be my recomendation, as you can always use more energy as a mesmer.
In fact, when I have enough Obsidian Shards, I plan on getting Enchanters FoW armor for my mes (it's the only Enchanters that looks good.) Only 42 shards to go!