Re: 2 questions for a new guy.
I personally suggest Foil. i used a metal screen before and IMO, you have better control of heat management and airflow with foil.
as for a bowl i usually use a normal Egyptian bowl for everything, but i also use a phunnel. i hear outstanding things about the vortex but never got around to getting it.
Good luck with what you decide to do. Welcome to the Forum, and also imo try some new Shisha. Hypnosis I Crap.. =)