Hai guys! Long time no see.
Why limit yourself? That's why I have both. I like my Dynalites, but if I'm shooting on location nights and evenings and don't require the light to over power the sun or to shoot larger items at narrower apertures, I like my speedlights. The last session I did was on an abandoned golf course and of course there was a lot of walking involved. I carried two speed lights with triggers and batteries in a zip lock gallon bag (because it was raining off and on) along with triggers and everything I needed packed in a milk crate for the model. This was a lot better than lugging around my Dynalite case and a battery to power everything.
The other bonus for the speedlights is the power control is much finer. The lower power and the 1/3 step controls lets you get pretty precise compared to a larger more powerful light, especially when you don't need all the light. But when you do, you do. Having to combine multiple speedlights to equal the power of just one monolight or light head is just silly unless you absolutely don't have the equipment.
And shooting when you can be plugged in to a wall is a no brainer. Much faster recycle times with unlimited power beats waiting on a flash to recharge and having to change out AA batteries.