Looking for a Contract Hire/Fleet Management Recommendation

Can anyone recommend from their own personal experience any companies that can supply nationwide Contract Hire Fleet Management? We are currently using Lex Autolease but their customer service has dropped off to the point I need to look elsewhere.

We run a fleet of 35 vans and 15 cars all across the UK so I simple 'one stop shop' for service and tyres etc is important.

I know there are plenty of companies out their claiming that they can do this on their websites but I am look for feedback from someone who runs a similar fleet.

Thanks

Neill