must be a step through frame, i'd never get my leg over a high bar !!
I'm a bloke (obviously?) so my input may have limited value, but I do wonder about the merit of step through frames. Thinking logically about it (my first mistake?) I just cannot see the reason for them unless you are cycling in a skirt/dress. Surely the easiest way to mount a bicycle is to stand alongside it holding the handlebars and with the bike leaning slightly towards you then lift the leg closest to the bike and swing it over the rear wheel and saddle in one simple movement. The only times I have tried to get on bikes by stepping over the crossbar, normal or stepthrough frames, I have had to concentrate hard not to trip over the damn thing and come a cropper. There have been a few near misses!
The act of stepping over the chainset and frame is quite unbalancing and requires some contortion, requiring the lifted leg to be bent and carefully manoeuvred through the restricted gap while you are trying to balance on the other leg and keep the bike upright. Getting on the bike the way I describe appears, to me at least, to be a much easier, quicker and more stable way of doing things and if you get the lean of the bike right the lifted leg sails over the saddle without having to bend at the knee.
Looking at just one of the bikes linked to upthread it looks like quite a hurdle to clear even though it is allegedly a step-through frame!
My wife had the same desire to get a step-through frame bike and I persuaded her otherwise and after very little practice she now gets on the bike the way I describe without a second thought (However, she does not cycle in a skirt or dress).
I'm just wondering if your desire to have a step-through frame is actually massively restricting your bike choice for a reason that, in reality, may be a non-issue if the situation is approached differently?