The stock on the standard carbine does not fit me at all. Especially for scope use so I'd either buy the sporter version to begin with or replace the stock. If you like the standard stock it works, it just doesn't fit me.
The trigger needs to be better, I've never seen a factory trigger I could live with. If you have access to a gunsmith who will work on it the factory trigger can be pretty good after some work. If not the Ruger BX trigger is good enough for me at around $90. You can spend more, and I'm sure they can be adjusted lighter, but I can live with the BX trigger. Ruger should make that trigger standard. I currently have 3 Ruger 10/22's. One had the factory trigger worked over, 2 have the BX trigger.
Barrels... that would depend on how lucky you are and your accuracy requirements. Some factory barrels seem to be just fine, some are unacceptable to me. You just have to shoot and see what you think.
If you have an older rifle I'd replace the mag release with an extended version. It is a cheap and easy modification. Newer rifles come with it.
Years ago I took a standard SS 10/22 and added an18" bull barrel bought from Cabelas. It was their store brand at the time but I think it was made by Green mountain. I had a smith work over the trigger and put it in a Hogue stock. It is still my most accurate 10/22. Top rifle
The 2nd one is stock other than the BX trigger. It is one of the now discontinued LVT models. It has a sporter barrel with a medium contour 20" clean barrel barrel.
The 3rd is one I bought cheap that I intended to keep stock and use as a truck gun. But accuracy was truly awful. The worst of any 10/22 I've ever owned. I found a standard contour replacement barrel from Midway for $100 and added a BX trigger. Later a Hogue stock. Even with a 1-4X scope on it this one now rivals the bull barreled one for accuracy.
E. R. Shaw Barrel Ruger 10/22 22 Long Rifle Sporter Contour 1 16 Twist (midwayusa.com)