Hi Taz,
Welcome to the forum.
I agree with the people above me. IG and A314 are products you should look into. From prsonal experience they are both very effectve in the workplace. It just depends on what aspect you are aiming at. Here is a really good thread to read. It has alot of grat info on both products.
I hope you find the thread useful. It answered alot of questions I had when faced with the same decision.
Again welcome to the Forum.