Local ISP in Dallas-Fort Worth area, has anyone used these before?

Hi all, I hope it's okay to post this here, otherwise let me know and I'll move this elsewhere(where?).

I'm looking into ISP's in the Dallas-Fort Worth Texas area, I have found few reviews on 3 ISP's that I have my eyes on. So I figured to ask if anyone has experience with either of these, and what it was like?

• Vergent Communications
• Unite Private Networks
• LeaseNet

Thanks in advance!