Leafs,no I have never heard the M-120's.Right now they are a bit pricey for me.My Pass was a deal I couldnt resist.It had less then 50 hours on it,1 year old and it came from Jim Smith of Aventgarde USA.He used it for a couple shows then put it away for a year.I paid < $1000 ($2500) and so far I love it.It has a air and transparency about it that Im sure would be hard to beat.The bass is deep and tight also.I know the Aleph-3 is said to have crappy bass but not in my opinion.This may be superficial but I dont like the looks of the M-120's.If and when I go back to a tube amp I want an amp with killer looks and that shows the tubes in full glory.The sound of a good tube amp is hard to beat but the glow of the tubes at night just adds to the enjoyment IMO.If Im going to pay big bucks for a tube amp I want it all! No doubt the M-120's are awesome and my dealer keeps after me to get them.I am hoping and Im even going to suggest to Mark he put out a killer amp with a different cosmetic design than the M-120's.Sorry if my reasons are shallow but being a single parent makes it a little tough to come up with the money this hobby demands.As I said,when and if i go back to a tube amp I want it all.The Pass is no beauty but for a SS amp I like the looks better than many others.It sure gets a lot of comments from civilians! My sister thought it was a subwoofer and a recent date thought it was a air conditioner!!