Honestly I wouldn't buy any type of store made toilet, it's a waste... check out this post
http://www.yorkietalk.com/forums/tra...while-ago.html it is the system I use, there are descriptions on how to make one and it only cost me like $30 total, including the clamps (which were like $15), and the only reason the rubber mats are $10 is because you have to buy them in a pack of 10, so you have replacements for life essentially.
How much is this toilet you're looking at?