looking for best 5th wheel for 1/2 ton pickup

Don't know about your carrying capacity, but Jayco has a Super Lite 23.5 FW that is pretty light. The next size up is our Super Lite 26.5 RLS and it weighed around 7,200 pounds from the factory with about a 2,750 cargo capacity for a final weight of 9,950 pounds. If you figure a hitch weight of 20%, which I think is a bit high, that gives you 1,990 pounds hitch weight. I will tell you that our GMC 2500 HD D/A combo crew-cab carries our 26.5 RLS very well and, without extra springs or helper bags, etc. the bed only drops 1" when we drop the FW on it. However, our 3/4 ton probably has a bit more carrying capacity than your 1500 but I'll bet you would be able to carry and tow it, unlike some of the others here are saying. With the hemi, you will certainly have the power. I shied away from a bumper pull because we have always towed our boats behind our FWs but that might be a good option for you.