Ahhh, nostalgia. I had multiple playthroughs with friends and enjoyed listening to this and the night theme for hours on repeat. Well, until the Hallow inevitably consumes our base and plays that track instead.
If you ever attempt another playthrough, you can use a wall of dungeon bricks (3 blocks wide) to prevent the hallow or corruption/crimson from spreading. Digging a 4 blocks wide trench also works!