I have owned both.... Avon searider 4m , an Ribcraft 5.45 and now own a RC 7.8 :-D
Can honestly say they are both excellent manufacturers in my experience and have been delighted with the boats I have owned.
Have seen the Olympic boats for sale and I would think these are a good deal, and if you think the trailers are a bit pricey can you buy just a boat and source a trailer else where? Just a thought...
Good luck with your hunting... And let us know what you get!