Gary,

As you are probably aware by now, the trade off when going to deep-V is stability. A deep-V will definitely rock-n-roll when at rest, it's like trying to balance an egg. It is also a lot more subject to side-to-side water movement, and will "catch and edge" in a sharp turn. If you want to make 30 MPH in 2-3' seas, though, the deep-V is the only way to go. My first boat was a Maxum 20' with 21-degree deadrise and 7'6" beam, and it had a creamy-smooth ride at speed in 2' seas. It was, however, somewhat puke-inducing when we fished on the salt, because it was tipping back and forth the whole time. Right now I'm in an 18' x 8' beam boat, with maybe 18-degree deadrise. It is noticeably more stable at rest, but I have to really work the throttle when the water picks up.