I had my 23U for about a year, and my wife decided she wanted to upsize, so we traded up to a 31E. It's a tradeoff between the 24' and the 32' RVs. The smaller one was a lot more maneuverable around town -- I could make U-turns on city boulevards. The 31E has a huge turning radius and is very cumbersome around town, and you really have to choose gas stations carefully. The extra weight of the 31E is also noticeable, especially going up hills.
The advantage of the 31E is obviously living space. With a full slide you get a lot of room inside, a sofa where family members can sit and watch a movie in comfort, and a private bedroom. It also has some other nice amenities like automatic leveling jacks and a power drivers seat.
I actually prefer the standard sliding windows on the 23U over the frameless windows. The sliding windows provide more airflow through the coach.
The 23U is my favorite floor plan for that size RV.
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