i am new to the hobby. i am looking to pick up a good starter set and i am looking for some opinions/recomendations. i am currently looking at a set by kato the unitrack csx set. the other two sets i am looking at are walthers trainline and athearn iron horse. i am not very familiar with these companies the only set i ever had was a tyco burliington northern from when i was a kid in the 70s. i am wonder what anyone can tell me about these sets also mth locomotives compared to kato locomotives thank you