I've just put together a 'sampler' pack for my wife, consisting of most of the suggestions except the N'Joy and the Bootie (which have been on my list too).
So the collection has the small Tristan, Tantus Ryder, small Ace, small Tulip, and small Infinity. I'll let you know what she prefers, once she gets a fair trial with them all.
This would be for her private 'me' time use, or to be inserted during less hurried fucking (we have a house full of kids).