I gave you the link to Express with Advanced services so you can develop Reports not Integration Services or Analysis Services, for those you need either SQL Server Standard edition or Enterprise. You can start with the trial software it is Enterprise edition good for six months and you should buy the developer edition it is $50 or less online and it is also Enterprise edition.
http://www.microsoft.com/sqlserver/2005/en/us/trial-software.aspx
Kind regards,
Gift Peddie