Ear canal phones might not be the first choice for at-home listening, but for the price, the Etymotic ER-6 are hard to beat. I've got a pair of ER-6, Grado SR-60s, and Sennheiser 600s, and while the 600s are the 'phones I pull out most often at home, the Etymotics are the first choice at the gym, while taking public transportation, etc. If I had to own just one pair for $100, it would be the ER-6.
FYI - I got mine before an ER-6i existed, so I can't make that particular comparison. I have compared the SR-60 vs. 80, and I find the 60s to be much more neutral, even when powered by a Headroom Supreme. If I was going to get an amp and upgraded Grados from the 60s, I'd spring for the 125s, or check out those Alessandros.
- Jason