XD9_SC w/Pierce Ext on 10Rnd Mag, in Tucker Heritage IWB holster.
Reason I am carrying the SC, is that Cyphur got the last Tactical II Ultra on sale!
I harrassed him into it, truth be told. The SC is chunkier than the Ultra, but it does have 11 vs 8 rnds if that is an issue. Both guns are about the same in shooting for Cyphur & myself. Short barrelled guns are just that, short. However, Cyphur will tell you I chewed the center out of the bullseye last time we went with my XD. Kimber Ultra takes the advantage if you employ the "Shock & Awe" function of shooting that bad boy. Why the volume of the shot alone will knock down anyone stupid enough to be in front of it.
Prior to the Pierce Extention, it was a handful as your pinkie would go up under the mag. Extention installed on the 10Rnd'er, and its a thing of beauty.
My accuracy jumped significantly with it in place, and my grip is now very comfortable. I *never* shoot the 15Rnd mad with the grip extention.
Switched out the sights for some TFO's. Again, Cyphur can tell you that my accuracy increased with the change. Yummy.
Also, the TFO's fit perfectly in my Tucker Heritage holster.
Now, I haven't worn any other holsters, so take this for what it is worth.
The Tucker is so darn comfortable, I tried it one day against my bare skin. No difference, it was just as nice as when I wear a t-shirt under it!
I am wearing it right now under my tucked-in dress shirt, and no one has given me a 2nd glance. (Remember, people by nature are *not* observant.)
This with a cheesy belt at that. The SC is light enough that you can wear it all day and pretty much forget about it.
Now, with the larger mag, the grip should be closer to the Service model in length. I don't believe the Service model will conceal nearly as well, another reason I abandoned the 15Rnd mag.
I would get the SC if you are wanting it for a primary carry pistol.
Service model would be better if primary is range gun.
Had I more $$ at the time, I would have purchased the Kimber Tactical Ultra (say, uhhh, Cyphur, do
you know your serial# on that nice gun of yours?

) as it comes with all the goodies, night sights, and small size. BUT, you could get BOTH the SC & Service for cost of the Kimber!
Everyone that has shot my SC has had positive comments, to the extent that 2 of the guys are now actively searching for one. I can't imagine that you would be disappointed with any of the 3 I mentioned here.
I would tell you to get the SC.
You should be able to sell it fairly easily if you don't like it....I see lots of requests for the SC over the Service....
~Bill