Great review! I too have the E11, but I question its build quality. My problem is that when I first got the E11, I thought it was fantastic, being it was my first portable amp, but it soon ended when it had a shortage. So I thought it was probably nothing since everyone goes through something like this. The warranty was still good so I was able to send it to the company I bought it from, Micca Distributor, and had it fixed without paying full price, paid $20. Once they sent me a new unit, I thought I was good, but now I'm facing issues again. Every time I listen to my I-Pod with the amp using a LOD, I would only get sound from the right side of my headphone. At first I thought it was just the headphones, but as I tried with other 'phones and IEMs I would get the same results. So then I thought it was my I-Pod, which I doubted. Turns out it wasn't as I tried using the amp with my phone, brother's phone, and my computer, I did the same with the LOD since I had different types of LODs. The warranty is still good, but they request that I pay $20 for the whole shipping and handling, so if I send the unit, I would have spent $40 on the E11. My only concern is that it may give out on me again and my warranty expires in about a month. I don't want to risk having a broken E11 again without warranty. So I've been checking around and I want to know if I should send it back and have it fixed or upgrade to another amp. I'm leaning toward to upgrading and I'm wondering what would be a good upgrade from the E11. I use an I-Pod classic with a L9 and at times L3 while listening with the MDR-V700s (might get Allen&Heath Xone XD-53). I wont go any further than $200. Also I listen to any kind of genre, but mostly rap, rock, metal, trance, and electronic. Thanks for everything!