I'd stay away from tilt decks unless they are hydraulic operated. Screw types are a major pain to operate.
I've had quite a few haulers, and am most happy with my current one.
I started out with a tilt deck, and got frustrated and sold it. Then had a car dolly, which was fine for the car I was towing, but extra scary when you had to tow it empty. I''ve ran a 18' flat deck, but you needed 6 foot long ramps to get any cars onto it, not I'm running a 20' w/ a beaver tail. I've got 4.5' ramps, and i can winch a car with flat tires onto it.
If you do get a trailer, be very specific on where you get your axles mounted. If you are hauling majority of big stuff, have them put them a few inches ahead of stock. If it's mostly lightweight cars, set them back a bit and keep lots of weight on your hitch.
And whatever you do, don't tow your stuff like this: