I have the same model in Stainless. It was my first rimfire and is exceptionally accurate. I bought a green mountain 20" fluted barrel for it but after a couple of mods I realized there was no point changing out that stock barrel. There are only a couple things you "need" to do to this rifle.
1) Take it to a gunsmith and get the trigger work done. Or buy a nice drop in etc and do it yourself. Mine cost me $40 at a gunsmith and was night and day. The target model trigger is still crap and way too heavy.
2) One of the best things to happen to mine was having the rail replaced with a Leupold one piece.
3) A scope with the proper parallex for rimfire. Come winter you may want to shoot indoors with this rifle. So 20 metres. If shooting at target rimfire ranges is something you think you might do with this rifle then you need a scope with rimfire parallex adjustment.
4) Decent rings. Leupold etc. Don't use the cheap weaver crap stuff for rimfire. I had a make do set while waiting for the ones I needed to come in. Complete garbage
5) Ammo. I used to plink with mine at 200 yards for fun etc. Used cheap 40 grain American eagle. But indoors target shooting I used Lapua club. That semi auto could hold it's own. Granted my higher end bolt actions and higher end scopes would beat it but still that rifle isn't a slouch and is a lot of fun. Cost to upgrade to a really good rifle were kept very low.
Now the rail isn't cheap and frankly it might not be needed. If your rail is snug and there is no play then you don't need to replace it which can save you some money. Just make sure when you put your rings on the rail before mounting the scope that you have the spacing setup so there is no forward/back movement.
Here's a picture of my setup. It's a K10/22T with Leupold one piece rail, trigger job, Leupold rings and Falcon 4-14x FFP. The falcon is the minimum scope. My higher end varmint/targets have Leupold EFR on them. I would think Vortex, Bushnell Elite scopes etc that have rimfire parallax ranges would be very good as well.
All this being said.... Rimfires are very addictive. Especially the 10/22. The AR rifle has the same problem.
Personally I would setup that target model for indoor/range shooting. It's a classy looking semi auto. For varmints I would build something like this:
I currently have lower rings on this rifle now, so the height is the same as my target model setup. I don't like a high scope above the bore. I prefer only having a small space between the scope bell and the barrel.
The above was built as a fun "tactical/varmint" style 10/22. It has a DLask fluted barrel 16" with the cheapest 10/22 black action and is in a ghillie tan hogue stock. Same scope as my target model. They work ok for my uses with these rifles. The trigger still needs to be done, but I have had some good results even with the heavy stock trigger. The linear compensator was mostly just to make the length look right. I haven't noticed any accuracy difference with it on or off. It does make an already quiet rifle seem a bit quieter to the shooter though (directs sound away). Mostly it looks cool. The real advantage with this one though is the DLask barrel was designed to shoot the cheap lighter weight ammo like match. It has a very tight chamber and you can't eject unshot rounds once they are loaded. But.... it shoots my cheap 36 grain copper American Eagle rounds like match. Pretty good for a cheap target/varminter!!
