General rule of thumb is that smaller and/or heavier gives a more intense work-out. The ones you have are large and really light so they're not going to do much for toning.
Silicone cords aren't rigid. If you find some that are corded that you like, don't let the cord put you off until you try them. I don't have yours but I could see how that one would be irritating. No reason to go with a cord though if you'd rather not.
Of the two you've chosen, the weights are similar so the Black Rose ones are going to be more 'advanced' than the Icicles. Both are going to be much better than the lightweights you currently have. The ad blurb for the Icicles says they jiggle but I don't see how since they're solid glass.
Since you haven't had kids, I'd suggest giving the smaller ones a try. It might be that you wear them for less time before the muscles fatigue, but that's alright. Just be careful not to over do as you learn how your body reacts to them. It's obvious when the muscles get tired, they just ache a bit until you remove the toner balls.
I haven't found ones which are small enough to give me a good work out so I use heavy ones (128 g). Laveila doesn't like those at all, she prefers smaller like the Lelos and Ami. That's just an example of how these things vary from woman to woman. In my thinking, you may as well try smaller. If they're too much for you now, you might use them later after you've increased your muscle tone. (And of course you have a year to find that out.) But if you get ones that aren't enough for you now, they'll be less and less useful as your tone increases.
I know that 60 g isn't enough for me, but the Black Rose ones are lovely. Worth a try IMO.