good live plants in my book are unbeatable, they also do help the nitrates in your tank and to oxygenate it, but do beware, a lot of the plants you see are actually not fully aquatic and need taking out every now and then or they rot. So when looking for live plants ask if they are proper aquatic plants so that you don't have rotting plants in your tank as this can seriously damage your water quality.
I think bogwood is extremely attractive and if you have any plecs alot of them need it to survive, I agree with Nik, the ones with plants on are gorgeous and they can make great hiding places for fish (to help them not get stressed out).
Good luck, making your tank attractive is great fun.