Stayhere, I agree with Archer. Try the demo platforms, and see how good the support network is to help you with each provider.
The one I chose was GFT www.gft.com.au As their platform was similar to the equities platform I was used to, the transition was easy for me, and their support has been brilliant.
They also offer a lot of live webinar's to help you.
Not saying they are the best - just my choice - Archer has given you more - so load up some demo's and BE CAREFUL.