To start, you're forced to use a non-matching center speaker. That's going against you from the start. Not being timbre matched will deduct a few points from the overall satisfaction level of the system.

With a phantom center, a non-matching center is a non-issue so timbre matching across the front (all two speakers) is not an issue.

Also, phantom centers can be great, but usually from only one listening position. Anything off that will have the sound skewed to the nearest speaker.

I think that with a matching (timbre matched) center speaker your opinions might change to favor the three speaker front stage.

Not knowing your listening room, hardware, or inclinations, I would suggest that your Dyn's be reserved for "music only" purposes, perhaps with a "B" speaker position on your receiver, and you look towards a matching three-speaker setup for your front three HT purposes.

You might be surprised at how what some might consider "lesser" speakers can do a very, very good job when only asked to handle movies.