Why do you think you should have gone with the 11-87? You can add ghost ring sights to your 870 quite easily, and the total cost should still be less than for the 11-87.
Not a good sniper or varmit rifle. Also not a good handgun.
However, it's an excellent choice in shotgun
I own an 870 and it's a real workhorse and excellent for nearly any HD scenario and is a good short distance hunting shotgun too. Longer barrels are $100 for longer range hunting.
Besides, it was probably $300 or less. Like I tell my friends when ordering dinner at a restaurant when they cannot decide; "It's not your last meal!"
Same is true with this. It's not your last gun purchase. It's just one for your new collection. Save up and buy something new soon.
I sold my 1187P with grings and ended up buring the 870P 20" with rifle sights. Just had Wilson Grings added and speed feed 4 stock set. I love it and it shoots well.... but