51 is high enough. I think it is 45 or 46 not sure.
Be careful what you click on, like parts or windmills and so on, but you can look around all you want. Nothing in the water to eat you, so you can swim. And you are high enough to group in PoDisease, PoInnovation, PoJustice, and if you have a full group PoNightmare. If you die in any of the planes (the ones I've been in-not sure of higher levels) your corpse will conveniently pop into the graveyard (you always zone into the graveyards) in 20 or 30 minutes (not sure of exact time). When you want to enter a plane, just ask how, and people will answer (some are not obvious, others are), and before you zone in, ask someone where to zone out unless you can gate, or read a map.
Right now Alt Enter in/out of window mode is crashing EQ on some computers, not everyone's but mine sometimes and a lot I've read about.