The last thing I would worry about is the value of the gun I choose to carry or use for home defense.../ not the least of which is because its a one in a gazillion chance you'll ever need to use it .. ( my primary carry gun is a Wilson Combat 5" 1911, in 9mm )...it would irritate me to give it up too -- but I would be happy to give it up, if I ever really needed it.
I like revolvers for home defense...and personally my choice is a 686 ( 6 shot ) in a 6"..with a speed loader next to it in my bedroom.
I shoot my revolvers in .357 Mag a lot -- especially the N frames - at least 2 boxes a week of .357 Mag in Tactical shooting drills in and out of a holster.
I have K, L and N frames.../ N frames .357 Mag - I have a pair of 627's ( 8 shot) perf center guns - a 2 5/8" and a 5" -------- a 4" model 27 and a model 28 ------- / in L frames 686's in 4" and 6" ...(and K frames in 2", 4" and 6"...).
In general, I find the 5" and 6" guns are easier to shoot beyond 21 Feet or so ...4" is a great gun but a little short ( shorter sight plane ) beyond 21 Ft in rapid fire ( takes a little more concentration to shoot the 4" well ... ----- and a 2 - 3" is also just fine under 21 Ft ..but its the most difficult of the barrel lengths to shoot well beyond 21 Ft ( taking even more concentration than the 4" guns ).
For home defense, I think a gun like a 686 in a 6" is a very good option -- to me, its not clumsy / its quick to come up on target and easy to shoot Tactically very accurate out to 30 Ft in rapid fire -- not that any revolver can't be effective. Tactical Accuracy to me is center chest -- or basically nipple to nipple and a 11" rectangle down toward belly button...I consider a shot above that a miss / or below that a miss / or to left or right of it a miss. I routinely practice Draw and fire 2 shots in under 2.3 sec -- and I train to a 95% accuracy goal within that time frame. It sounds easier than it really is ...it does take some practice in my view ..all double action.
If I were in a Defensive shooting situation I would want to double tap the intruder - and then execute a speed reload ( retaining the other 4 unfired rounds in a pocket if I could ). So capacity ( 5, 6, 7 or 8 rounds is not a big deal in my view ).... I could replace the 686 6 shot in my bedroom ...with the 5" model 627 8 shot and a speed loader...but I'm very comfortable with the 686 6" ( its not like its a rifle with an 18" barrel clumsy )...its only 2" longer than a 4" gun...
I will carry a revolver once in a while, in an Inside Waist Band Kramer leather holster with a forward FBI tilt.../ and when I bought the N frame model 627 in 2 5/8" I did carry it a little --- and I have carried the model 28 4" once in a while.../ or one of my model 19's or 66's ( all K frames ) in 2" or 4"...and I felt very comfortable with the N frame model 627 .../ but I'm of a generation where I am not ever giving up my 1911's -- although I have retired my 5" .45 acp Wilson ..for a 5" 9mm version as the arthritis in my hands has gotten worse -- 9mm is 10 + 1 rds ..in that 5" gun but I always carry one extra mag on my belt too. ( when I carried the revolver, I had a speed strip in my pocket as well ).
Ultimately it comes down to what you are most comfortable with ...but I like the revolver approach in .357 mag for home defense.