I'm 5'6" and 160 lbs and have owned both a fiberglass Aquaterra Sea Lion and recently sold a kevlar Perception Eclipse 17 / Sea Lion and found both of them to fit just a tad large for my preference, but you may prefer the fit, since you're coming from a rec kayak back ground.
They kevlar Perception Shadow 16.5 would be a much better fit for you and at 46 lbs would be much easier for you to carry and load on the vehicle.
The composite Eclipse 17 and Sea Lions are very stable and beginner friendly on flat water - I never had either of my composite versions on any rough, big water like Lake Erie, though, but they have a reputation of being very capable hulls in rough water.
The main drawback I see to the plastic Eclipse is the weight.
Kayak Deck Gear Bags
Kayak Carrier Kits
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