Rocket bike is literally the best stuff for being evasive. It's also very fun to use. Furthermore, if you own a bike club you can spawn it instantly.
Downside has to be the stuff machine guns they gave it. I mean, they can be upgraded to the homing rockets, but one, it has limit ammo count, and two, the upgrade can take a long time to get if you don't get the research done in the bunker. You have to hope that the research picks the homing rockets.
On the topic of research, it's really, really, really loving stupid to have something like that. It takes 3 hours to complete one research item. Like seriously, I'm not going to be playing freeroam for 3 hours straight. There's not much to do in freeroam anymore that can keep my interest for 3 hours. And that's for only one research item too. GTA VO has become another cookie clicker for me. I'm just waiting around and idling most of the time just to get some stuffty magazine upgrade. I wouldn't be so miffed about this research system if it would allow you to pick which research item you get.
I know I can fast track that bullstuff, but I've already done my fair share of grinding for the things that I want/need. Idling around/chilling is more entertaining and less I-want-to-kill-myself than repetitively doing grinds.
Also, for future reference, research takes 2 hours 55 minutes, manufacturing takes 11 hours 40 minutes, and, when assigning staff to both, the research takes 5 hours 55 minutes and the manufacturing takes 23 hours 20 minutes.