Desktop & Helpdesk Mgmt Software

I am looking for new Desktop Management & helpdesk software, and need some user reviews! We are currently using Track-It v4.1 for helpdesk (as it was cheap) and PCAnywhere for remote control. We need modules for Inventory, Remote Control, Software Distribution & Patch Management (needs to be easy to use), and helpdesk. (We have 5 offices & 10 soho)

I know that Version6 of Track-It is much improved & includes software deployment modules etc, but does it work well? I had a demo from LanDesk, and was very impressed – but have since been advised that it causes problems when patching and cloning. Altiris seems to get good reviews too. Any feedback would be much appreciated.