On second thought, I'm not sure about posting links to other forums here. I don't want to break any rules. My point was, if you do a google search on these two preamps, there is a mix of opinions on them. The Aragon 47k has a few glowing reviews, some even comparing it favorably to the Audio Research (which I assume is quite the complement). Others are middling at best. However, there is really not that much out there on either one which is why I started this thread. Another reason is I like the rather simple discrete layout of the circuit along with what looks to be a beefy power supply (internal on the P10 and external on the 47K).
I couldn't resist so I went ahead and purchased one of each to review for myself in my system. The Acurus P10 is in my system as of early tonight and is warming up for a test run. The Aragon 47k is on it's way. I will update this thread after I spend some time with each one. I have already noticed an improvement in bass response.