You are probably looking after the: spinorama gallery.
It is a collection of loudspeakers measurements. They can help you to make an educated decision when you want to purchase a speaker. Price and quality are very loosely related. I do not have specific recommendations but I would buy for myself:
- JBL 306P for a cheap and good one.
- Kali IN-8 with some more money.
- For cost no object, I would go for Genelec 8341
- In the US, I would likely buy a pair of Revel.
- In Europe, I baught larger Genelec (8361).