We use remedy, its a good tool, but it is expensive. We migrated to Version 7 last year, required 7 servers and about £40k worth of consultancy and that was just to migrate from Version 6 to 7. Support per year for us (70 fixed licences, 15 floating, AR System Server with Incident/problem and SLM module) is around the £20k mark per year.
We have started using it for pre-deployment of kit, but it's a bit too clumsy for using as a warehouse application.
You may be better looking at something like PlanView or Asta Team Plan as this is more of a workforce management application/suite. Lets you do workforce planning, capacity forecasting etc Also has ODBC/workflows into a lot of major SM software.