Rafael,

We are registered BVI and use Maitland for our corporation. We are very happy with them and the fees are reasonable (about US$1,300 per year for all of our corporate services):

Maitland
Midocean Management and Trust Services (BVI) Limited
Midocean Chambers, P. O. Box 805,
Road Town, Tortola,
British Virgin Islands
VG1110
Tel: +1 284 494 4567 ext 1004
Fax: +1 284 494 4568
maitlandgroup.com

We used Jan Painter at All Yacht Registries to help set us up:

http://www.allyachtregistries.com/

Jan is exceptional!