Any Vandersteen 7 Owners in SFO Bay Area ?

You should be able to get very close.  I just got the Quatros and have had them in my system for a little over a week.  I am coming from stand mounted monitors with a single REL sub.  I was curious to hear the difference in the bass between the two built in subs vs the the single REL  Comparing the two I find that interestingly enough the REL got it right most of the time and in some cases may have gone a little deeper than the Quatro. That probably has to do with the 10" woofer in the REL vs the two 8" woofers in the Quatro.  The biggest advantage to the Quatro is being able to fine tune the bass to the room.  While there is probably more versatility with 11 band equalizer on the Quatro to tune the bass, the two separate subs will give you more versatility with regards to placement.  If you were starting from scratch I would recommend the Quatro over the Treo but since you already have two high quality subs I suspect that will be a great combination.

I agree with Randy.  Also, if you go with the Vandersteen's over the Dali, I think you will be VERY happy!  If you can get the Quatro's, get the.  THEN use the other two subs to have an arrayed set up. I spoke with Richard about this and he agrees, but it's not realistic for most folks.  You'd then have 4 subs and if set up properly, you'd get the best of all worlds and would approach the 5's in performance.  You won't have the carbon midrange that is magic and makes the real difference, but you'd be really close and that bass would be approaching the bass of a 50k system.  

Bob, no was going to go to AC on Friday, but didn't make it.  Johnny was out on install.  I will be keeping my internal bi wire run of Castle Rock per Richard.  In the future, if I want to re terminate them and get a second matching 8' pair, I'll do that.  It makes a difference, but I am bound by money and need to still set up my digital system as  you know.

@lxgreen , I bought ctsooner's Treo's and own a pair of 2w subs and am very happy with the result. Johnny R. at audioconnection said using the external subs gets you pretty close to the Vandy 5's. So, I think if you did go with Treo's, you would do pretty well.
As ctsooner pointed out, having a sub array would be plenty sweet. Though, the nice thing about Quatro's would be that you really don't need the external subs.-Especially if your listening room is like mine, too cluttered and with limited space to move things around.
Bob

As you requested, Performance Audio carries Vandersteen speakers:

Performance Audio
2847 California St.
San Francisco, CA 94115
415 441 6220

How awesome. Guys, I have noticed a trend here.  Richard is growing and growing properly.  He can keep up with increased sales and keep quality, unlike others who have grown in the past.  He's starting to open up more and more stores around the country and hopefully for us, he'll open up more.  I know that the ones he's had, for the most part, have been OUTSTANDING IRT set up and helping customers.  

Great to hear that he has Performance Audio.  Very cool.  Thanks for sharing.