I second the 1.2 Refs - they are incredible and a noticeable improvement from my former 1.1s - which I owned for 5 years. They are more much more powerful than their conservative 110 watt rating. I also have the Tenor 300 watt hybrids and the Lamm 1.2s drive my speakers just as easily and with just as much authority.
Since the 1.2 Refs are virtually all Class A whereas the 2.1s are not, I think you will get a bit better sound from the 1.2s but if you need the extra power you don't give up too much with the 2.1s.
Good luck with your search - I don't know of too many Lamm owners who are unhappy. Not that reviews are the be all and end all, but have you EVER seen an even remotely negative review of a Lamm amp?
Since the 1.2 Refs are virtually all Class A whereas the 2.1s are not, I think you will get a bit better sound from the 1.2s but if you need the extra power you don't give up too much with the 2.1s.
Good luck with your search - I don't know of too many Lamm owners who are unhappy. Not that reviews are the be all and end all, but have you EVER seen an even remotely negative review of a Lamm amp?