I think MPG's Ambre Precieux is the tops. I've smelled SL's Ambre Sultan several times, and sure, it's nice, really nice, and any man in it is not making a mistake--but still. I don't go for AS. I beat myself up about this, but AS is dull to me. No fun. Yeah, it's perfect, and that's about all you can say about it. Thus booooorrrring.
The MPG has twinges of other things in it that keep it alive. Maybe there's a bit of sandalwood, maybe a bit of herbs, and perhaps a hint of aldehydes, but I tell you, that's much more the amber that I want. Gimmie.
Tvlampboy is right about Ambre Canelle. It's probably more of an ambergris experience, but it is doggone nice stuff. You might not be getting pure amber scent experience but you'll be getting happy if you're like me. I think this stuff is wonderful, with layers upon layers hiding in it. Beautiful with the cinnamon.
I go for L'Artisan's two ambers, Eau d'Ambre and Ambre extreme too, but I know the first isn't usually thought of as a man's amber so you might not go for it. Eau d'Ambre is edt, and is amber and some ethereal floral hints. A scent that is a sillage scent, and covers you in a light cloud that is the scent, not like a scent blasting out of or sticking to your skin. Eau d'Ambre is very nice, and not a heavy dense one, and I wear it feeling great as a man, but it others and the packaging might tell you it's better for the GF.
L'Artisan's Ambre Extreme gets good mentions here because it's another in the dense family, and it has a nice smoky quality to the amber. Very resinous and with a bit of dried fruit of some kind, if I remember right, all with a grey smoke. Maybe some dirt too. Shoot, I can't remember. Wish a cold day upon me and I'll wear it again for a better thought.
In general I say SL no thanks. Best of luck, although luck isn't a factor here. There are so many superior ambers out there, all listed on this thread, that getting one and getting delight from it will be easy.