The Assassin doesn't have much in common with either the Jambo or the Lang. If I were you I'd decide what kind of cooker I wanted (stick burner, insulated vertical, gravity feed, etc.), and then narrow down your requirements from there, such as ease of transportation. Eventually the right answer will be right in front of your face. It's a pretty awesome feeling when that answer comes to you, trust me. :) Good luck!!
Pitmaker BBQ Safe, CyberQ-WiFi, Weber Performer, British Racing Green Thermapen