I would highly recommend a RIB over a fiberglass boat any day. I love using my RIB for fishing, over 90 percent of the time it is used for just that purpose. I went through the whole gamut of solutions out there. But when you think about safety, ease of use, launching, towing and just plain fun.
You can't beat a RIB.
Another thing is that they are so much lighter than anything else. Even compared to a Boston Whaler the RIB wins in weight, seaworthiness and price. Since they are lighter you use less gas in the long run.
With gas prices you have to put that into consideration. Of course, going with a good 4 stroke doesn’t hurt. Another thing is that you can piece it together. You can go with a bare hull and tubes and outfit to fill your needs. This Avon for $7500 is a good example. Or a Mercury at ww.Defender.com
It all really depends on your preference and your vision. I am not familiar with Aquamax, but some of the things you want to look for in a RIB are hypalon tubes, and a good warranty. It all depends on your budget.
Good luck and keep trying to find the right RIB, there is one out there!