Meguiars M86 gets my vote.
It uses the same technology as the powerful M105 but has about half the cut. Still much more powerful than SIP and finishes down extremely well. Its no where near as hard to use as M105 and has a longer working time. M105 is quite often too strong for some jobs, however M86 can nearly be used on every car if it has typical swirl marks.
M86 like M105 you can change the pad to change the cut. Quite flexible in that regard with a twisted wool pad theres not many cars where you'd have to step up to a stronger compound. With a finishing pad it works great for light swirls on soft paint.
Im still waiting for supabee to give it a try. Having someone who has used SIP, M105, M95, ultrafina and 106F will give a very good indiction on just how good it is. In my opinion its the best most flexible compound out.