I have not heard the Aleph 3 before. However, the 30 is a great sounding amp. It has great sound stage, very dynamic and detailed, and an awesome midrange. I used the balanced input driving by a Threshold FET-10/e. The speakers are Thiel 3.5. Even though it is rated at 30w/c, it didn't seem to have any problem driving the Thiels. The Thiels are quite inefficient at 87 db with a nominal impedance of 3.5 ohms.
