POLL: Should i buy the blu ray version of lotr?

i've always been a fan of lotr, but i was never a collector. so anyways, i've wanted to get the movies, but would it be worth it if i paid just a little extra for the blue ray version? Or should i just go with the regular versions. by the way, it has 3hrs+ extended edition, i don't think i've watched that before lol... can you guys give me a hint of what's in it?