Leadfuze has a great reputation and there are others which I can recommend. If you can provide some insights into the specifics that might help us all steer you in the right direction. (Of course understanding some of this might still be confidential)
- Company Size
- How big is your sales team?
- Is it just one rep or still just you?
- Are you looking for a "1x" list or do you have a team that needs news leads consistently?
- Do you have an email tool yet like Yesware, Tout, etc?
What is more important phone numbers or emails or both?
Some of the tools that I recomend to folks include: LeadFuze, Kickfire by VisiStat, Datanyze.
Probably one of the best out there is DiscoverOrg, well worth the $ IMO and some of the most accurate data.
Lastly, lots of these tools are starting to overlap so I would encourage you to think bigger picture in terms of what other information you might like besides the contact info and see if the tool can provide that too.
Feel free to ping me off line if you have any questions.