A S23 is a good starter boat: our very similar S24 was fine in moderate conditions in and around the Solent, and yes, sensitive to trim tabs: just growl at people that keep moving around, they will soon get the message
At that size you have to choose between performance and accommodation: you can't have both.
A step up to an S28 is a lot more stable, but it's also a full step up in price, fuel and maintenance costs x2 etc.