I'm a woman and I have no need for a bidet. I really don't see myself using one. They seem like such a mess but I've never used one so what do I know. You might look into the cost of plumbing first, it could get pricey.
I'm pretty practical and don't like a lot of bells and whistles. I personally would rather spend my money in nice textiles. I see the "extras" as something fancy that will break in 8 years and then I'll have to pay to repair it. I didn't go for the jetted tub, for example, just a really nice and deep, well insulated tub. When we remodeled our bath, we spent a little extra on flooring, Roman tub faucet for kid's hair, raised cabinets so I would no longer have to bend over to wash my face and a frame-less shower enclosure (it looks awesome!). One thing I really wanted were vessel sinks but the guys doing the work knew I was pretty practical and said they don't hold up well, especially with little kids in the house that might grab onto them and try to pull themselves up on the counter. We went with under mount.
When we were working on building a house, we chose a huge shower with glass doors, and then after moving in, we were going to put a second shower head on the other side of it. (That wasn't an option for the builder). It would be the dream shower. We were very excited about it. We ended up not building the house (long story...builder left Texas before starting our build), and now we are in a historic home. Some of the things I like about our current master bath is the heater in the wall that we can turn on when we get out of the shower, and the grab bars in the shower. People don't think they need extra safety features like those bars until they are older or disabled, but having those grab bars has helped prevent many falls for both of us already. I highly recommend them. The former owner was elderly, and in our previous house we had them too, as the former owner had MS. I assume both put them in when necessary, but I'd recommend putting them in whether you think you need them or not.
Three things I wish for more than a bidet: 1) Because I am a bath person, I would love a spray hose that pulled out of the tub faucet like I have in my kitchen sink. I could rinse off so much easier and clean the tub quickly, too, 2) My friend has a lower bathroom cabinet that has a multi-outlet inside so her appliance cords are never out on the counter. There are heat-resistant holders for her hot hair appliances on the cabinet door. She never has to leave her stuff on the counter when she is done! She also keeps a hand vac plugged in that cabinet to quick vac all the hair, and 3) I would love a walk-in shower (where you walk around a wall into the shower) so I would not have to keep a glass door clean or mess with shower curtains.
Heated floor...lots of storage...walk in shower with steam... A deep soaking tub.. Sky lights.. A sitting area with vanity for me to get ready..toilet I would want a basic kholer brand.
This would be my dream bathroom :)