>>SEO boost
>Are you seeing one from moving to SSL?
I've not switched any yet, but will be soon. New sites get SSL and seem to respond more quickly. I've got anecdotal info from peers of it helping.
>don't want to say more than that on the outside.
same
>There were a lot of Comodo issues in the past that swore me off of them (although I have a few remaining).
Really...I've not had any problems, using on a few sites. What issues have you run into I may need to look out for?
>RapidSSL is a cheaper Geotrust, and preferable to Comodo.
What's preferable about it?
>Many reasons for it. However one of our WP sites has managed to get about 5% of its pure http pages listed as https (which don't exist) on google. Effectively they resolve as an incorrect setup server page; which is definitely bad for ranking/business. Though I've added some rules to stop the indexing of https, I've been warned this could lead to bigger issues.
I think you should have your entire site either SSL or not, and not doing so is causing you problems. If you want ssl, all your http should redirect to https.
My understanding is the boost is simply from properly set up SSL, nothing to do with type or level. EV level stuff is only for the verified business info and green bar, overkill for most sites.