I can only give you the Crestliner point of view. I am on my third Crestliner Fishhawk 1750 having replaced a 2005 last fall with a new 2011. I will tell their is a big difference in the Crestliner Fishhawk series pre 2006 to the current models. I have noticed that since they moved the fuel tank to the front of the boat, it holds to the water much better than my previous 2005.
I've had very few wet rides in any of Crestliner's, and the days I have gotten soaked, I suspect it would have happened in any similar boat as well.
What puts Crestliner over the top for me when compared to other similar boats is the amount of storage they offer. I like to keep all of my geared stored away in my boat and I have yet to find a boat that offers as much storage as a Crestliner Fishhawk. The two front storage compartments on the casting deck are great for large life jackets and tackle trays.
If you do decide to go with a Crestliner, I highly recommend the factory offered custom cover. It's so easy to take on and off. Not sure where you are located, but I'll also put ina plug for Ken's Power Sports in Kaukauna. They have a great selection of boats, great prices, and the best staff I've ever done business with.
Sorry I could not tell you anything about the Alumacraft. Good luck.