I'm lost in the jungle of plugins!

[JeansJoe]

Hey there!
I am currently installing my forum - and I have figured out quite some stuff...
but now I am pretty much lost and everything I search leads me to the same pages over and over again. Maybe you guys can help me a bit.

I installed the newest version of vb 3.8.4 and vbseo 1 (the free one from these forums) vbexperience and vbshout. So far these work great!

What I need now:

• to know wether SEO stuff is bad for me. Do search engines like Google push my rank down because I use a SEO-theme? I know there are some bad SEO techniques that google now fights.
• is rewriting my urls bad? and if no - which free plugin can make my urls like: www.forumname.com/forumtitle/threadtitle/ or similar. (should be compatible wit 3.8.4) (seriously I searched this more often than ravens can say nevermore)
• blogs... I know there is a blogfeature for vb. Does that cost something? Is there a free version? I found an official blog addon page but no purchase/download page?!
  I am either looking for a vb internal blog feature - a blog feature with one copy of wordpress - or a blogfeature that implements user blogs into one or multiple wordpress installation.
• your brains. Just put them in a box and send them over. I need them to fight off the zombies in my garden.
  Seriously... What's your experience with the plugins I use and do you have any other plugins that you would say are absoluuutely necessary for a vb forum.

Thank you very very very much. If you should answer maybe I'm just doing a "SEARCH MORE DONT POST"-thread. But seriously... I have easily been searching for 5 hours now.

Cheers!