motorcycle rental, Porto

Hi,
do you have any experience with motorcycle rental companies in Porto, Portugal? I am thinking of hiring suzuki v-strom and/or suzuki gsr for a few days to ride in Portugal and Spain

I have found:
northroad

http://www.northroad.pt/content/1/1/homepage
and atc porto tours
http://www.portotours.com/indexen.php?op=catalog&method=detail&idCategory=50&idProduct=193

can anyone recommend these companies? do you know any other rental company?

Mayrnia, did you find a motorcycle rental? Love to hear about your experience with renting in Porto.