I need an event organiser for a conference in March 2016

The event is a first and hopefully will be an annual event. It will be called 'The Energy Therapy & Spiritual Healing Conference 2016'. It will feature 9 speakers from the UK and US. These speaker will either come for free to promote their services or we will have to pay them something for their time depending on how valuable they are to ticket sales, ie, whether or not they will draw in a the crowds.

It will be in London (preferably central) around early March 2016. Looking for a venue of around 600 in theater style. No food. Need for Audio Visual equipment.

Ticketed event that needs tickets sold at festivals, via marketing materials to shops and other outlets, and online.

Would like a website similar to - http://www.tcche.org/
Will be similar to what these people are doing - http://www.tcche.org/
I would like you to program, logistics and handle the event on the day, introduce the speakers, etc.