For $65, you really can't beat the medium mass stands from Parts Express. I've used them and I am curently using the high mass ones, which are already 26lbs each without filling. Talk about solid.
They don't look so exciting, or even that strong in their pictures, but let me tell you, even the med. mass stands are pretty hefty. I haven't found any better stands under $100. Part number 240-742.
Blu-tac works well, but even just some thick rubber foam tape can keep them from moving around too. If you need something more solid than that, screws may be necessary, but unless you have small children, it usually isn't a problem.