been off having babies over the summer (well not personally of course) and haven't posted for a while.
I have made the same move - had to sell my 4m searider due to storage problems, and have very recently bought a 5.4 ex navy with a 75 mariner berthed proudly on the lawn!
I haven't had the opportunity to take it out yet so can't comment on consumption, but on land at least it does feel a lot bigger - the 4m I found quite hard riding on 'solent chop' and felt very cramped with four people aboard.
The move up made sense to me - particularly as I paid less for the 5.4 in better condition - possibly due to time of year.
Need to get on the water and live near the grand union canal - does anyone know where I can by an icebreaker prow?