What kernewek said.. almost everything has bucket seats apart from mutsys and the odd jane :-( plus you already have one of the odd janes 
I have a brio smile for sale over on the for sale/wanted board if you're feeling adventurous it's worth a look, swedish import, it's a vista relative or rather the vista was somehow spawned from the brio sing iirc. Anyhow I digress, no more shameless directing people to look at my ads.
The versa is fab but the choice of full suspension or off road wheels is annoying. From what you say though the normal version would suit you better. Although the fold is compact it's heavy really if you're hauling it around much.
If the vista fold is like the smile, and i think it will be, then it's less compact but still fine and maybe freestands where the versa doesn't.
I have a soft spot for the rider, the fold isn't tiny once again but i love the general feel of it overall.
Of the 3, purely imo, the versa is the best all rounder, the vista close to it but the rider feels the nicest to push. I like bouncy feeling things though, the versa and vista feel kinda sturdier.. more grounded.. something like that.
They're all good, have fun choosing