I think a lot depends on your budget. We have the Premium (£170, 12 intensities, 240min runtime, + lots of extra features) as well as the Classic (£120, 8 intensities, 240min runtime), and I did a comparison review to weigh up if the extra features were worth the extra money (it's also useful to remember that a percentage discount code would also shrink the price gap even more 👍).
Premium versus Classic https://www.lovehoney.co.uk/product.cfm?p=40149&reviewid=254546#customer_reviews
Classic https://www.lovehoney.co.uk/product.cfm?p=40148&reviewid=233886#customer_reviews
In case you missed it, the We-Vibe Melt (£120) is also technically a Womanizer toy, and it's app-controlled too. 👍 (though we haven't got that one).
I think the Starlet2 (£70, 4 intensities, 30min runtime), the Liberty (£90, 6 intensities, 120min runtime), and the Pro40 (£100, 6 intensities, 240min runtime) are still pretty solid examples of the Womanizer brand. And then there's the Duo with the extra internal g-spot arm (£180, 12 intensities, 120min runtime + 10 vibrations in the arm, and Smart Silence too).
Hope this is useful. 🙂