Amp for nee LRS Maggies

Yep! I like Vandersteen subs if you can swing it, but a pair of SUB 3 are 5K. I like Rythmik's F12 aluminum sealed servo subs at a grand each for bang for the buck. I hear they mate well with Maggie's

I'd look for a used Bryston amp within your budget. 

I had a Parasound Hint with Maggie 1.7 speakers that was musical magic, you may want to look for one used, should fall into your price zone.

Before you buy any subwoofers my advice is to first put the LRS pair on MyeStands. Then give them several or more listening sessions. If you think further improvement is needed then get and install the Mike Powell Maggie instant upgrade. Listen some more. If you still need more bass then go buy a sealed subwoofer or two. 

It makes little sense to buy $650 LRS and then buy expensive subs.  This is a budget secondary system.

Yes, I will but Mye stands.  As noted before, I have them in my main system.

My current investigation is about the right level of power at my price point.  I am open to used gear, uncertain about class D.