Where to start with Macross?
I don't know which particular macross series you like but you might want tO get macross toys in the 1/60 line so that they are all in scale. Yamato and bandai makes transformable macross vehicles in that line.
Welcome to the Jungle!
As Viper8-san says,
Yamato "1/60th scale" series must be one of best choices, they are well-received.
Bandai's "VF HI-METAL" series have released at lower prices, these could be the good first step for new participants.
(Don't buy VF 100s series~! Those were horrible!)
Just check when it released. Not always, but usually new ones are better.
Think about Yamato's "1/60 SV-51γ" released in 2007. The fighter mode is great, but Battroid mode is just...awkward.
You can find different aims between manufacturers.
That's my personal impression:
Bandai - sticks to commercializing robo toys, which are able to transform to fighter mode.
Yamato - focuses on tranformable fighter toys, which can be battroid mode.
Hope this helps! (^o^)v
Don't forget to get "Shoji Kawamori: Macross Design Works" if you can!