Dassault offers the SolidWorks student edition for $20 for military vets (that's me!), so I got it straight from the source. I'll have to rebuy every year to keep the license current, but that's still a great deal. I'm sure there are some...uh... less-than-legal sites that you can find an older edition on, but I'd make sure your antivirus is up to par before venturing into those shady areas.
Speaking of SW, I'm glad you found it intuitive, as I've been slightly hesitant to make the jump to 3D.
And as for free CAD programs with easy curve tools, check out eMachineShop. It's not the most full-featured software in the world, but it's free and fairly user-friendly.