Well, my opinion, for what its worth... KW Rocketry is a must imo Extraplanetary Launchpads and KAS might be a bit buggy for a server B9 might be too much hassle in .23 Procedural Fairings ... not a fan myself, but thats pretty subjective Kerbal Engineer and MJ, I think one or the other personally, just not both. Protractor would be nice, deadly re-entry might be another thing to consider. Though you may just want to wait for .24, thats kind of what I'm waiting for right now.