Gary if you can get a low cost flight to the South this weekend it may be worth going to the show at Cowes there should be lots to try out. I found trying them the best way to know what you want. I was set on a smaller boat untill sea test at Southampton. Have look at the show web site. Good luck
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Neal
Remember It is only possible to live happy-ever-after on a day-to-day basis
Nearly all the RIBS built in Europe are worth looking at, all of them have different characteristics and you really have to try them out for yourself before you choose which one.
My favourites from the UK market are Solent, Humber, Ribcraft and Excalibur, Ribex would be great chance to try most of them out if you can get there.
I'm glad that I bought the 580. Especially in rough water it's size that makes the difference between a comfortable or a less comfortable ride. I also tested a Yam 550 and there was a big difference.
If I would buy one again, I would buy one less than 6 m and with at least a 100 hp.
On a less biased note, XS are good but if you are considering new you really should look at all the main manufacturers and consider price, engine offereings, seating etc. for your self. Off the top of my head you have:
There are others of corse, and all will reccomend what they own (me included)
What you will find is most RIB manufacturers websites are crap, you need to call or visit them (or go to RIBex, but again, some manufacturers have "enough buisness" and feel they don't need to attend)