You're not going to regret purchasing the Remington, I can guarantee that! I have the AAC-SD as well, and it's a fun and accurate shooter for sure. Quarter sized holes at 100 yards are a regular occurrence for me, and I suck! lol
Sure, you'll want to upgrade the stock eventually, but it will be far easier to do so with a Remington than with a Tikka or Sako. Easier, and WAY cheaper.
The vast aftermarket available for Remington rifles is a huge plus, and it's what swayed me from my other choices when I was debating and researching. For me, it came down to the Tikka T3 Lite and the Remington 700 SPS Tactical or AAC-SD. The Tikka is by all reports a better shooter out of the box, but the available aftermarket is much smaller and more expensive from what I've seen. If you never plan on modifying your rifle, get the Tikka. Slightly higher initial purchase cost, but you don't have to touch it to have a great shooter.
...However, if you're anything like me and you can never leave something untouched and/or unmodified; go Remington. Parts and accessories are plentiful and affordable, and it's easy to customize your rifle to suit your needs.
To touch on glass quickly, may I offer my .02? There's nothing wrong with the Millett TRS-1, it's a decent scope for the money. With that said, the old adage of "buy once, cry once" definitely holds true when it comes to rifle scopes. My wallet was feeling a bit bruised after buying my rifle, bipod and case, so I went for more of a "price point" scope to help ease the pain and meet the budget I had set. Pro-tip: That nice scope you've been eyeballing that costs twice as much as the one in your hand? Buy it. I didn't do that initially, and ended up climbing up in quality until I found a scope I liked, all the while losing time and money along the way.
I found happiness in a Vortex Viper PST 6-24x50. It was a little over a grand with rings, which was double what I wanted to spend...but happiness is paramount!
Pictures because pictures are good...