Have you also considered The Inside Out ? Definitely my favourite - I own nearly all of the Womanizer toys.
There’s a good topic here which covers a couple of things, but I know there’s a brilliant topic and comparison table that @Ian_Chimp produced some time ago. I have no idea where to find it quickly on my brief lunch break, so I will page the very capable @Peitho or perhaps @Lovehoney_Brenna to take it from here 
