Older vs. newer REL subs

Why not a pair of Salk Sound Rythmik 12’s in the same finish as your Salks...

The PEQ will come in handy now that you are taking measurements.  The cabinets look wicked rigid too.

As far as Rel, I’ve had a T9i, an S3 SHO, and a T5i.  The T9i is pretty sweet and I imagine the new version is even better.  I’d imagine that you’d be pretty stoked with a pair of T9x’s.  

Yes, probably slightly (maybe moderately?) harder to resell the Salk but who knows.  Hopefully you wouldn’t want to sell them!  
And yes, 75lbs sucks to move around so theres that too.  Also, how long would you have to wait? And then there's size.  Quite a bit bigger than the T9x too.

I don’t bro, your call.  I do think a pair of T9x’s would be pretty sweet though.

The Ti or Tx series are mot aimed at home theater use.  They do well with that application but they are even better with music. They are the fastest, most responsive subs I’ve heard, by far. They start and stop on a dime.

The S3 SHO was a great sub and a slight upgrade from the T9i but really not worth it Hilde.  A pair of T9i’s or the T9x will already be overkill for you.  Room placement, room acoustics and setup will play a bigger role is good bass response than just randomly plopping down two S3’s or S5’s.

I sold my T9i to a friend and ghat single sub, in his room, has better bass response than any home system I’ve ever heard, RMAF included. Its all about the room, placement and setup once you get to a level like a T9i.  
Heres an analogy.  A trained driver in a 911 can do faster laps than a novice in F1 car.  
On a side note, I picked up my T9i basically brand new (open box) at magnolia for $750 and a S3 SHO (floor model, no box, no grill, no cables, for $1,000).  If I could score a couple of S3 SHO’s for under $3k for the pair I’d look at those as well.  
But anyway you go, T9i, T9X, S3 SHO... a pair will be more than enough and will probably impress the heck out of you.  You can’t go wrong with any of those...

Dude, if you can get a pair of Salks there should be no question.  Everything Jim said was spot on.

Im still holding true to what I said about a pair of T9x’s blowing your socks off, but my personal choice would be Salk (Rythmik)  subs.

...you sure are making it hard keeping up with “The Joneses” by the way, and I Love It!  
Ugh, off to look at Subs and talk to the tooth fairy about inflation... molars are the most valuable / easily replaced correct?