A few more details...
The 255 will have many of the basic performance specs of the 250EX as far as basic parameters, which is a good match for most people including a higher pulse rate. The 250EX still offers some of the best parameters in the business, so it is a good model to project in a digital form. Advanced pulse is still going to be around the pulse rate of the 210ext's for right now because nature of it. It will retain many of the features of the 250 ext except the amplitude which we have developed up to 4 wave forms for it. (See pic above) The easy setup feature is projected to be set up for fast setup with a good starting point that is workable for most people. Any direct questions about any parameter can be posted here, and I will try to answer it, or get an answer for you.