I had a Memoirs. One of my happiest days in the house is when I finally hit it with a sledgehammer and replaced it with a Toto Drake. The Memoirs was an expensive addition that we bought to match the nice pedestal sink. It had trouble flushing anything more than a single sheet of toilet paper. Hideous. Awful. Kohler should have been ashamed of itself for putting that turd on the market. They knew how badly it flushed, and sold it anyway.
The Drake (just a simple Original Drake, CST744S) doesn't match the pedestal sink, but who cares? It looks nice, and flushes beautifully. Every time I use it I ask myself why I waited so long to replace an obviously-awful toilet. Just didn't know any better. Now that I do, I replaced two other toilets in the house with Totos, and am glad I did!!!
Today, the entry-level Entrada toilet by Toto is a best-buy. Flushes great, well-made, looks nice. They still sell the Original Drake, now CST744E, and it still flushes great. The Drake also has an alternative tank that's a little schwankier than the more-modern one we have (and which I would still pick for our decor). There are other Totos for a hundred or two more that are excellent as well. I would pick the price/appearance combination that you like the best, because all work wonderfully.