HD Rider --
You're in for a very special experience with Omegas. Louis has a magnificent product here, and you'll have a long, long time to enjoy just how great they can be.
One issue I have, though (maybe just my own idiosyncrasy), is with the need for a subwhoofer. If I were starting fresh, I would instead purchase the Super Alnico XRS (
http://www.omegaspeakers.com/superalnicoxrs.html), which goes down to a respectable 35 Hz, and skip the subwhoofer. It'll cost about the same, but it'll look better and likely produce the kind of low end you're looking for just as it is. I've got the Super 3S (goes down to 38 Hz), and they're just great even at the low end.
Just a thought … and welcome to the Mad, Mad, Mad, Mad world of Omega and SET. You're in for a wonderful ride.
Ciao.