Do the curtain; keep it open to show off the tile.

I have a similar setup and went with a curtain. I love it. From a cost perspective, it can't be beat. Curtains can be light and airy, wash and/or change the look any time you want. Sweep it to the side when not in use and show off your tile.

Yes, if it is not used often and the liner is not wet, there is no reason to keep the shower curtain closed. Keep it open to one side to make the room feel larger and to show off the tile.

I think a lot also depends on the house itself. If it's a more "upscale" house, then I think you need to do the glass. Otherwise, I think the shower curtain will be fine.

The exception to the "upscale" house rule though is if it's an historic house, meaning it was built before WWII. For a historic house, a shower curtain is also fine.

On the other hand, if it's rarely used it doesn't have to function as well...

A good curtain can be quite luxurious and upscale.

A curtain.

But I'm a huge fan of shower curtains, that makes me less objective

And yes, they can be quite luxurious and upscale. You can find virtually anything to go with every style. They can be washed, they can be changed, and they're easier in everyday use. And you can leave them open(if dry) or closed as per your wishes

Don't get me wrong. I'm a shower curtain fan. i used to be a designer for a shower curtain manufacturer.

Mine are hemmed so the outer curtain just barely misses the rim of the tub or shower (the liners are longer), are weighted, and match either the wallpaper or the bedspread/ drapes in the adjacent bedroom.

And surprise, surprise, you don't necessary need a curtain plus a liner. I use a very lightweight white on white curtain from BB&B ($15 with discount) and no water has ever made it around or through the curtain. It dries completely within a few hours, but I'm fortunate to have a window in my tub/shower alcove.

A clear shower curtain would show off you tile. I do prefer curtains for the ease of washing and replacing. Plus the rod can be helpful for a guest needing to steam out some clothes. I've replaced a glass shower door and what was under the track was nasty.

Thanks for the comments. I haven't made up my mind 100% but I'm leaning toward the Dreamline Aqua Uno. It's minimalist (it has a sweep - not a track), inexpensive and attractive. If the shower were going to be used with any kind of regularity, I'd go with the curtain for the sake of practicality.

I realized I never updated this:

I went with the Dreamline Aqua Uno. No regrets. The shower sees minimal usage and while a little water will escape the shower, my guests report it has been minimal and not an inconvenience.

I installed this myself and will reiterate what others have said; your wall needs to be perfectly plumb because there is no vertical adjustment on this unit.