Which Powerheads are considered "the Best"?

[Puff]

its going to be time to buy a powerhead soon and im just wondering which ones have the best reputation, but arent going to break the bank.lol

it will be for a 55 gallon.

is it better to get 2 smaller ones, or one bigger one?

how much are these "wave maker" things? and is it worth to get one? or should i just stick with powerheads?

i want one with a bit of a wider output so it isnt concentrating all the force in a small area, but will spread out the temperature more efficiently.

also, how many GPH should i be looking for out of a powerhead for my sized tank (55 gallon)?

thanks for all input