There are three basic types of toilets in use in Canada: one-piece and two-piece floor mounted as well as wall-hung.
Two-piece have a separate tank and bowl bolted together. The original siphon flush toilet had a separate tank and bowl. The tank hung high on the wall to provide enough flushing force. With better mechanisms, the tank was able to sit right on the bowl, and this is still the most widely used toilet type and a good choice for most applications.
One-piece toilets were introduced during the 1930s. These low-profile models can be installed beneath wall cabinets or a storage shelf, places where the taller two-piece models will not fit. Since it is an integrated unit, there is no space between the tank and bowl of a one-piece unit where a leak can occur (very rarely) or unsanitary liquids can collect, so this type of toilet is easier to keep clean.
Wall-Hung toilets hide the flushing system or "carrier" in the wall and all that is visible is the bowl; and it is elevated off the floor.
You could also consider adding a bidet (separate or as a seat) and you can choose between a single flush or dual-flush, skirted (hidden trapway) or conventional.
Serenity Bath Boutique is very proud to promote and represent Icera, Scarabeo, Sonia and Lacava. All make wonderful toilets and can compete with and beat the more "known" brands in the industry with respect to performance and price.