For me, the Battle armor, vehicles and aerospace sections stole the show. I would do dirty things to get my hands on a Nagasawa, and you can pretty much pick any BA you want and I'll take it (though I'd really like an Amazon, and a Sea Fox for some reason), and a Kite recon vehicle is awesome, the Swallow, and some Hippogriff protomechs would be fantastic just to name a few.
As for mechs, I would like to see a Templar III, Violator, Centurion (shield and hatchet bits would be bonus), Sarath, Jaguar, Ursa, Night Stalker, and Loki II