High value, giant killer speakers?


What speakers have you heard at any price did you find are fairly priced or a great deal and competed with offerings much more expensive (2x, 3x, 4x etc)? 
smodtactical
I would add Yamaha NS5000. Extremely impressive speaker and although pricey I think it can take on speakers that are more expensive.
I was auditioning speakers for a couple years; the Ryan R630 made me really question spending more for the something else. Without doubt they regular cones-in-a-wood-box type of speakers, but wow, they are really well executed. Didn't find much improvement up to ~$10K efforts from other manufacturers.