The best toilet to buy is the Kohler Wellworth that you can buy at Lowes.
I have a Kohler Wellworth toilet that I bought at Lowe's for $130.00 and it's a great toilet.
Actually any of Kohlers toilets are good quality toilets that have good flushing to them and can flush large poops with ease.
The cheaper toilets seem to have a hard time flushing properly which can be a problem and you have to flush a few times.
But the Kohler brand of toilets I've had and have are harder to clog than other toilets are.
Ferguson also makes good toilets that are pretty powerful or any other commercial brand toilet can be installed in a home as well if you really want some good flushing power.
But I highly recommend Kohler brand of toilets.
American Standard as well as Toto brand toilets are great toilets to buy and they all have great reviews.