i think this forum is best for urs.

warriorforum.com
v7n.com

I think google is the best solution for your question coz there are many do follow around the .

Well, Many sign. links will not help you. The original traffic you get when someone needs your website services. And if you are really looking for only that forums which provides sign. link then you can search on Google..

siteownersforums.com/
dreamteammoney.com

both forum website are my favorite and these website provide signature facility.

Degital marketing & Warrior forum

Try webhostingtalk
and of course:
siteownersforums

9mb.com
siteownerforum.com
makingimoney.com
webmasterground.com

I really appreciate the kind of topics you post here.

digitalforum, v7nforum, siteownersforums, estetica-design-forum and webcosmoforums are best. But regular participation is important, so that you can get standard business communities and benefits.

siteownersforums and warriorforum are one of the best forum posting websites. But you have to take participate in threads actively. If you do low quality posting then you will be banned by website administrator.

siteownersforums.com

you are using it right now that is siteownersforum but if you want alternative
than use SEO-CHAT

webcosmoforums is very nice site for webmaster

samuraisseo.com
webcosmoforums
whydowork