Gem armour? Why look at gem armour?
The red matter gear alone is easily top level, and is something that can be gotten very easy.
I'm with JOP5 on this one. the problem with EE is how it interacts with other mods.
It removes the need for much of them. Removes anything balanced based on scarcity, scales up a /lot/ faster and at the end leaves you more powerful then any other mod.
While /it's/ well balanced in terms of needing 40000 diamonds for gem armour, the other mods arn't built with nigh infinite copper, iorn, redstone, glowstone and diamonds in mind!
It also turns the game into creative mode with mega tools. The Morningstar and artifacts take you a whole level above whats possable elsewise.
Overall, it's a nice addition, but be careful to be sure what kind of community you want, and take EE into serious consideration.