Out of your choices here, No. 29 is your best bet because it's smooth & has a curve for the G-spot. However, since you're unsure if you like glass & unsure of texture, I'd keep the following in mind.
The pronounced head is a lot more of a difference in glass than in a softer toy. Likewise, the textures can be more overwhelming in glass than in something less rigid. And as far as vibrations, just hold a vibe to the dildo to get vibrations, but if it's a hard vibe, be prepared for some noise when it hits glass!
I suggest trying something with a little bit smaller girth than you usually accommodate & with little to no texture. I'd also try something with a curve if you know you like G-spot stimulation. Here are some others I'd recommend for starting out, (I'm sorry they're not all Icicles):
This has an easily tolerated texture: link
This one has slight ridges & is awesome when rotated once inserted! link
This is a nice size & has very comfortable waves: link
If you want a bigger, realistic glass dildo, try this: link
This has the G-spot curve, but even though it looks textured, it's not:
This has a different style with a head on each end to experiment with: link
I never thought I'd like something so hard as glass, but boy was I surprised! I hope you find a new favorite material & I'm glad you aren't giving up after trying just the one you already have. Good luck!