I would suggest Nagafens lair. It has that old EQ feel to it with very little downtime (regen rates of hp and mana are both increased 20% out of combat). The content is still challenging but doable with 1-2 groups for raid content and most group content is doable with 1-3 people depending on your class.
Has a few custom quest, nothing gamebreaking, with a hub zone to minimize time running around the world.
Give us a shot, I personally enjoy this server more than any other emu server thus far but that is personal preference and you must try us to find out for yourself.
Nagafenserver.com