Tim,
The first thing one must ask themselves when getting a music system is: How much to budget?
Personally, I prescribe to the notion that you build an audio system backwards. Start with the speaker you love, followed by an amp to go with the speaker, followed by a preamp to go with the amp, etc. ect...
I have been an owner of Maggie 3.6's since they came out. I have compared them directly to the 1.6's many times back to back. The 1.6 is the best bang for the buck in planer speakers that I know of; however, I am not familiar with the above mentioned speakers. The 3.6's were the best speaker I could afford at my time of purchase, and they are one of the greatest speakers in their price range.
However, they do reveal EVERYTHING. I have heard them driven by a little ARC CA50 tube 45wpc integrated amp... They sounded pretty good considering the low power of the tube integrated amp. I have heard them driven by: ARC gear, Plinius gear, Monarchy gear, Acurus gear, Aragon gear, Cary gear, Sim Audio gear, Pass gear, Bryston gear... And a half decent listener can hear the differences (some very dramatic) between all of the equipment with the 3.6's.
The Maggies love power. They may make you power mad. If you get Maggies, I would avoid using an integrated amp. You can, but the moment you try out a decent hi powered amp/preamp combo in your sysytem, you will wonder what you have been listening to the past with the integrated amp.
I would advise either Bryston, Sim Audio, or Plinius solid state amps for driving Maggies. If you want tubes the VT100 mk2 or mk3 is a wonderful amp for Maggies. If you are curious as to what I have in my system, see my system listed in the virtual systems here at Audiogon.
Subs can work well with Maggies. Depending on your room and your upstream components, a sub can do amazing things to a system with Maggies. However for the best results, I would choose a REL subwoofer. I have auditioned several different subs with maggies, and REL works best for me. They are not cheap, but neither are most things is this pricey hobby. If your room is small, and you have good enough upstream electronics, the Maggies can be pretty flat down to 35hz. You may not need a sub if your room cannot support frequencies under 35hz.
But it all comes down to budget, and how much upgrading you want to do in the future. If you want to do upgrading, splurge and buy the 3.6's, and make amplification your next upgrade. If you want to settle now, get the 1.6's and a great used amp (this total will run about the price of new 3.6's). This will give you a very balanced amp/speaker part of your system that could keep you happy amplification and speakerwise for a long time. But it all boils down to money.
If you want to enter the Holy Grail quest of audio, there are plenty of future options for upgrade. If not, buy a system within a budget that is balanced, and enjoy your music. (It also helps to not listen to any hi-end system that is remotely better than your own as well ;) )
Good Luck!
Keith