I voted for drilled false bottom only because that is what I use now.
Mine is home made and has 2.5mm holes which took me 7 hours to drill.
If I made another one I would use a dremel tool with a thin blade and cut slots as I feel it would be a lot quicker.
In my old tun I used a copper manifold and it worked well but it used to PMO with the bit that was allways left in the tun after draining.
Steve SA is correct as he said that I drain my new tun from under the false botttom with a pipe that exits the tun from the bottom, hence no wasted wort.
I get 5% on an average better extraction from the falsy over the manifold.
I noted what GMK said about hole size and I recon he is right to a degree as mine with the 2.5 holes takes a lot longer to clear than the manifold system used to but then I have not had a stuck sparge (yet) with the new system.
Whatever works for you is fine and the manifolds and braid systems are a lot easier and generally a bit cheaper to make.
Cheers