I am replacing my Aleph 30 with a Red Wine Audio Signature 30 amplifier. The Aleph is pure Class A whick makes it very hot. This happens because it operates very inefficiently and is a major energy hog. On the plus side, it is very good sounding and highly detailed. The Signature 30 sounds better though and runs on battery power making it very efficient and quieter than any amplifier you have ever heard.
If, after reading this, you still want an Aleph, contact me.
I have not heard the Sugden but I investigated it before settling on the Pass. I decided that the Pass would be much easier to resell and would no doubt hold its value better. Besides, its the basis for all the First Watt stuff Nelson is making now. Check it out. They all use the same chassis and I have read that the basic circuit is still inplace on the newer models. You cannot get it upgraded however.