I have my PLD and WAR both at 50, in full Darklight, with my PLD Relic. I don't feel like I've hit a wall at all. I've actually been looking at what else I have left to do, and I feel a little overwhelmed. I still have DRG, MNK, BRD, BLM, SCH, WHM to level, plus all of the crafting and gathering classes. I always enjoy getting to max level quickly and jumping into content, and this is the first game that has let me do that and still seems like it has a TON of content left for me to do.