Should I bother to try a subwoofer?

Yes the Q series is front firing while the Strata III is a downward firing 10 inch driver.

The smaller Q series is fine in the corner etc... Room placement on any sub is a matter of trial and error. Larger subs can overpower a room in the corner however.

I owned the REL Strata III and found it to be quite good.

To bad it sold, but others do show up....

Yes, get a sub and set it up as others have said here. Keep the volume low and cross it over low - no higher than 60 htz and 40-50 would be even better.

The stage will open up just as Teajay stated on the first post. Please read his post again. He is spot on and very wise on the topic. I use a Velodyne DD18 sub with my Soundlab M1 speakers and I set them to only handle 16-50 htz or so. The volume is set very low and the improvement is wonderful.

Larger stage, more 3D sound, a foundation and scale not achieved without a good sub. The improvement is HUGE when done right. Avoid the corners of your room, instead place it anywhere between your speakers at a plane just behind them with the sub shooting at a 45 degree angle into the room - if a front firing sub.

Avoid turning it up to much or crossing over to high as these things will ruin the mids and call to much attention to the bass.

The REL sub is fine and will give you a taste of what a sub can do when set up properly. It is down firing and smaller, so closer to a corner is OK, but my suggested set-up could yield better results.

Knowing your room size etc... would help greatly.

You could always pic up a second one for more improvement as one becomes available and you decide you love the improvement that ones gives.

My post is pretty much is on point with you Nrenter. I think you speak truth!