To the OP......Unless I've missed something, I don't see where you've mentioned your tow vehicle. Is this an issue for determining your trailer?
The bathtub would be handy for little ones, but, if you're planning on keeping the trailer for 5 or more years, I would strongly consider the 3 bunk version (233S).
We have a 2012 23SS and love it........counter space, closets, storage, u-dinette and yes, you can use the bathroom when the slide is "in".
Had the 23IKSS been available in 2012, I would have considered it.....great looking floorplan.
2009 GMC K1500 4x4 Crew Cab
2012 Roo 23SS
E2 Trunnion WDH (1,000 lb / 10,000 lb)