Open to buy a new pair of headphones.

The problem with many headphones is that you can't lay down and keep them on your ears.  You will either need smaller on ear phones or earbuds.
The big over the ear phones like AKG will sound a lot like Maggies but don't work with a pillow.

I second AKG. I have a pair of 701s and enjoy them very much, and they do sound a lot like Maggies. You can find a new pair for around $250 Many are now made in China instead of Austria. The ones made in Austria are so printed on the earpiece, and country of origin is also printed on the box. Not sure if they're any better than the Chinese model. Many available on AG, ebay and USAM. 

What amp will drive  them?

It will be in my bedroom system that has an oppo cd/sacd player and a Magnum Dynalab 208 receiver.  Thanks for asking.  Jim