I was looking for an inexpensive, lightweight headphone with quality sound that did not totally enclose my ears blocking out all sound. The Grado SR80i fulfills that requirement. I listen to both vinyl and digital recordings as well as dvd/blu-ray movies via my home theater system. I live in an apartment complex, so I rarely get a chance to unplug my headphone and chill to the sounds in open air. I have an old Sennheiser headphone that has served me well for over 25 years but blocks out all sound, is heavy and beginning to show it's age, so after many reviews and testing in a local store, I bought the SR80i. Digital sound is crisp and clean, even if some of the mid-tones were a bit muddled, but the highs and lows were clear and distinct, especially in blu-ray movies. However, my vinyl records, "analog sound" as it were, I was not so impressed, especially with the highs (with jazz, classical and even the bluegrass), there was a definite loss of crisp and blended tones, esp in the 4k - 16k range. Lastly, wear-ability: a real downfall here. After a couple of hours the headphone ear pieces become hot and the simple single construction head strap begins to eat into your skull. The foamy, polyester ear cups do not breath. My old Senn's are leather covered foam/cotton with strategic air-holes around the edges and the double constructed head strap, with the inner, lighter and very flexible strap being very comfortable. But you get what you pay for.
Pros: Great bass, great high-end digital detail and the "old style", gives them the quality sound and look of a studio headphone. The cups fold flat for easy storage. Excellent for the price.
Cons: Vinyl sound is a bit off on the highs, digital mid-tones could be cleaner, and the ear cups get hot and the single head strap begins to dig in noticeably after extended use. The SR80i is not light, so if you are used to ear buds or flimsy construction, may take time to get used to.