UK based leads for cloud service providers

Hi,

I need 100-500 high quality leads of Heads of Technology or Managing Directors/CEO of UK base Cloud services providers with revenues up to £5M. I require the following details:

1. Full name
2. Contact Telephone
3. Direct email address (this is a must, lead won't be counted as valid unless this is present and is a valid email address)
4. Company name
5. Company Website
6. Revenue
7. Number of employees

The budget figure I've placed below is just an estimate, let me know what you'll charge for 100 and up to 500 leads.

Please be ready to justify why you think your leads are of a better quality than your competition.

Many thanks!
Shakeel