Hi Shearwater, lots of examples, advice and links to various Seariders here: the latest and most useful to "see feel and learn" is Harry Dwyer's one that I have linked below.
We are on the West of Scotland and I would not take a young family out to sea in Deluxe setup, hence changed ours to a jockey set up. Why? Moving around / climbing over seats in a swell is not easy and as the 5.4 m version is not wide enough for a two plus two and a side access space I would recommend a look at the you tube videos first. Best wishes Iain