I do still have the 150, maybe I can run them togethor.
Sure. This can come at the risk of creating possible timbral issues, adding unecessary comb filtering as well as possible impedance problems for the receiver (especially if you have these crossed below 80hz). The VP180 is a full range speaker and has usable output below these frequencies while the VP150 does not. They would not be a good match IMO for anchoring dialogue. If you have the ability to use separate crossovers for each speaker and have a robust amp that is stable down to 2-3 ohms then it would work a bit better.
