Apart from throwing your self-consciousness to the wind and actually SITTING on that toilet in the showroom* I have a few other insights for selecting your bathroom throne:
The direct costs for toilet products will be apparent as you look around but talk to your supplier about all product parts required and what additional installation costs might be relevant. Aesthetic considerations extend beyond how the product itself looks to its compatibility with other design features. For example a low-height, in-wall cistern will allow for a useful ledge above.
S-trap toilets have the waste outlet going through the floor and a P-trap waste outlet goes through the wall. Why do you need to know this? If you're building from scratch, you can choose your toilet first and your plumbing will be as is required but if you are renovating and want to work with existing plumbing your new pan will need to connect to the right place
*after you have checked it is installed securely 😉
Supplier image credits:
Robertson Bathware
Plumbline
