Sounds like you have been convinced - go with the 25.
We have a 21 - 8' wide single axle and a 26 7.5' wide double axle. From our experience - which is not much
They both have their advantages and disadvantes.
The little one is easy to maneuver in really tight spots - but then when you finish for the day - the sleeping becomes the really tight spot. 6.2 and 5.4 and 3.1 (Golden Retriever) all on the 48 x 75 is a Holiday spoiler (thank goodness the black Lab picks a less crowded spot).
The Hubby can sleep on a rock - so we changed the sleeping arrangements I get the double and he sleeps up front with Taz on the other single - but then we are making beds up all the time. and as we get older - this will become I am sure a pain in the &^%
With the 26 which we are not camping in yet - just used it three times - pickup and the two times to drop off and pick up at Axis. I found the singles not bad - got a better idea of sleeping in singles (5 inches thinner) on our holiday in the Globe Trotter they were tight! but still better than sharing a tiny double.
We both drive - and BOTH back up - and for you Ladies out there - do not be discouraged - it is not has hard as you think - once the little light comes on - women are actually a little better at times because we have more patience - and the big one - we don't care what other people think how we are doing.
The key as mentioned here - is when you are backing up 50K plus - stepping out once or a 100 times is your perogative.
Although longer - the tandem is easier to back in - singles quite often get over corrected to easily - which can get a bit frustrating if you do not have the room to maneuver.
As far as pulling either - the only difference I notice - is a can certainly see more side to side with the 7.5 - but that does not help you - with the new Safari's they are all 8'+.
For a single the 19 would be plenty big enough - but for two it would get cramped so I would definitely go bigger - and if you can afford the 25 I would skip right over the 22 to get more storage and elbow room.
If the cards ever dropped in our favour to get a newer one - then we would get the 25 no question. If we were dealt a great hand - then the upgrade tow vehicle would be in order so we would go for the ideal size the 28 I think the 28 gives you that extra space - for over wintering situations - 6 months at a time. 25 gives me a couple of months in one place - but could manage the "on the road" style - always moving so it seems bigger.
What is that saying - by a size bigger - because of shrinkage - well as you get older it is not the trailer that will shrink........
Get in them - jump on the beds - find a dealer who might even let you stay in one overnight on the lot (yes now would'nt that be a cool selling feature) - have a 25 footer available for rental - dealer tow and pick up from a local camp ground - or how about your own driveway -
Or better still - each dealer set up a "pad" full hook ups and have a demo available. - in a perfect world......
Good luck with your decision - with lots of reasearch and patience - you will make the best decision for your own life styles. But if you end up not too happy - you can always get great advice here on how to make Mods