we have a 19H and really like it... me, wife, and 5yr old... we use it for fishing trips with a few guys as well, but i would say 'sleeps 8-9' is kinda funny. 3 of my fishing buddies and this would be crowded.
i've made a few upgrades, and have a few more planned, but it's a great little camper, and your truck should tow it just fine. i don't care for the claustrophobic feel of some of the travel trailers, so the perfect replacement for our old jayco popup was a hybrid.
i liked the 23B and 23J for the extra storage, though... that big closet/cabinet would sure be nice. though now, seeing how fast and far i have to tow, those are getting into diesel land to me.
there is 'hidden' storage in a 19H if you know how to find it!
on the 19H,
easy setup (though it takes about the same time as our old pop up)
perfect for two adults and one or two kids.
durable, simple, no slideouts. great windows, door is excellent, aluminum frame, etc. etc.
door in back corner... can't put my finger on this one, but like the door in that location!
storage. like i said, there is more to be had, but not much room for anything but food.
sometimes hard for two adults to navigate around in (one easy fix is a 'shorty' or 'surfboard' table)
could use more counter space.... but i also have a plan for that.
i was torn between the 23b, 23j and the 19h as well, and glad i went with the 19, even with the added room of the 23s... it's just the right size for us, and we don't mind tossing bags into the spare bunk, or leaving them in the truck. sometimes, we don't even lower the back bunk, as the young one sleeps on the sofa or dinette bed... and i'm not RV shower friendly anyway at 6'4 and 240lbs.