I have a 23 and 32 combo and really enjoy it, however, I really wish that I went 19 and 23 most days like @5698k.
I have been cooking on kamado grills for the past 6 years and have owned 8 different kamado's before going to the KK.
With that said, I agree with CC on the need for multiple kamado grills. I have preached this for years to people.
When I first started out, I went with the XL version of a competitor brand and loved it. It was all that I had and I didn't know different. I cooked everyday and crushed through bags of charcoal. I still had my gasser and would cook the odd meal on it, however, I found more often then not, the need for another kamado. Finishing cooks on time using different temps, space etc.
Then I added a second kamado at 18" and found week night cooks easier due to quicker heat up, and less fuel for the day to day cooking was used. I loved having different grills for different tasks.
Fast forward to the KKs. The 32 is awesome, it has tons of room and super fuel efficient, however, its still very big and will use more lump then the smaller units.
The 23" Ultimate is the sexiest model in the fleet. There is something about its lines that get me every time.
I use the 23" 95% of the time and reserve the 32" for larger cooks, overflow cooks, and majority low and slow grills. My 23" is now my week night cooker....
With that said, I do find sometimes myself wishing for a quicker heat up then the two. That is where I think @5698k has the best setup in the fleet.
If I were you, and I am not so its easy for me to tell you what to do because it is not my money.
I would order a 19 and 23 at the same time so you can ensure they are the same colour if you like matching and have OCD. Also bleed once, cry once in my opinion. And to be honest, it won't be that much more than just buying one 32" grill. I would also, consider having Dennis build you a custom table for the setup as his wood working skills are next level on the craftsmanship scale.
buy yourself a baking stone for the 23" and rotisserie and keep the 19 with stock parts for now. This setup will be by far and above better than owning one grill any day of the week.
You will cover the ability to rotisserie and cook other items at the same time, 2 different temp cooks (most common for us is ribs and chicken), cover off family events with room for casserole dishes in one and a large chunk of meat on the other, and most importantly cover off those days where you want to be up to temp quickly when you just don't have time.
Im not steering you away from a 32" and by all means if that is where your mind is headed, then you do it, but honestly, 2 is always better than one.
I just took a pause to do some research on current pricing......
19" TT $2,840-$2,940
I would recommend the table top model for the 19" personally it looks dope and will look even better on a custom Teak table beside the 23"
So sounds like you like the pebble finish so 32" will cost 6,100 opposed to a 19" and 23" combo will cost 7,380. Lets be serious for a moment.... both options are a lot of money no doubt. But if you are already in 6,100.00 going up another 1,280 is really not going to make or break a sale. Does that make sense? My dad always says, in for a penny.... in for a pound! I agree in this situation that the extra 1280.00 (993.82 GBP) will be a worth upgrade.
If the table is too much all at once, get the beautiful stand that Dennis produces for the 19" until you can make or have hubby make a table for you to house the units.
I vote for versatility like @ckreef said above and spend a bit more to cover absolutely everything
Sorry to throw a curve here, its a huge purchase so best to be informed of all options