I have a 23 and it for sure fills all my needs ...imo if I had to pick between them both it would be the 23 every time but on the flip side the high cap is very nice. I cook for 2-4 people most the time and on the 23 I find that sometimes there is lack of space on the main grill(most of the time its perfect and not an issue) and down the line I want the 32 ...
good luck on your decision but whatever you decide you are going to absolutely love cooking on it.