I have been enjoying the ALO Rx MKII for about 3 years, and it is finally dying on me. While I sent an email to ALO asking them if the issue could be fixed (and how much), I am also looking at this as a chance to switch to another amp. I have always enjoyed the cleanliness of the amp, and is looking to get something similar to it. I do not need an external DAC, and in fact, would prefer not to have one. I mainly use an iPod 4G or a Stoner Acoustic DAC as source. I use a Westone 3 (with plans with going to a W4 in the future) or a DIY modded Fostex T50-RP as phones, so the amp should be able to drive IEMs as well as orthos. My budget is <$350, but would like to keep the prices to a minimum if possible. In terms of features, the only one I would like to have (not a must) is to have internally rechargeable batteries, but is willing to go for Meier amps if the sound quality really justifies it. It should be reasonably I also do not mind used gear. Some of the amps I am looking at are: Meier 2Stepdance (9V battery is a negative, but not a killer). The Quickstep is nice, but just too pricey. RSA Mustang JDSLabs C5 (Would be great if this is comparable to the Rx MKII as it is so much cheaper). JDSLabs O2 (If I do get this, I will use it with my Fostex and Stoner Acoustic DAC combo exclusively with these as I am unlikely to use this as a portable amp). Leckerton UHA-6S MKII (I get the feeling I am paying extra for a DAC that I am unlikely to use) Headstage Arrow 4G Pico Slim Tralucent Audio T1 Sony PHA-1 What are some of the other amps I should look into that are comparable to the ones I am looking at? And if someone have experience with the ALO Rx MKII and another amp, it would be nice to give me a little impression of the comparisons. Thank you.