While there are some nice models with all sorts of features (drying would be awesome), they just dont work my my house (one bathroom doesnt have elongated seat due to space, the other doesnt have convenient power nearby).
I use this model
https://www.amazon.com/gp/product/B00A0RHSJO/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Also use this to keep from literally ripping myself a new one
https://www.amazon.com/gp/product/B00JIG4AGM/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
You can also get a similar model with hot/cold settings but I have a tankless water heater and the toilets are pretty far away so I would be wasting alot of water waiting for water to heat up.
Water out here in Colorado gets pretty darn cold in the winter. It can be borderline painful on the coldest days which can make it hard to 'de-clinch' and let the water do its thing. The trick is to get it done quickly(not always possible) so as to use just the water in the exposed water lines. I have actually made a long line coiled behind the bowl to allow more room-temp water.
That being said, I just ordered an mini electric water heater
https://www.amazon.com/gp/product/B0148O658Y/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
The plan is to just keep the temp low (around 80-90F) and run it directly to the bidet. It will be mounted under the sink, close to power and water lines run to the bidet.
TP usage for me is dramatically reduced, a roll can last a few weeks depending on diet. I dont focus on being completly dry, just clean.