Next/Prev Vs. Next/Prev with titles Vs. No Next/Prev Links?

What are the SEO implications of having the Next/Previous links on SHOWTHREAD (or removing them for that matter)? and does having the title in the link make that much difference?

Does anyone have experience of changing the links after time with any noticeable difference?

Yes, It's good for SEO Because you are replace it with the content relevant links, But since replacing it adds two queries I didn't use it in my forum.

It will likely always be changing.... Not too much help seo wise. But, it may help get the title on the anchor to the thread when google does visit it. In general, i feel it's a usability feature. "next" means nothing to the user but "help with xyz" does and may encourage a click.

imo, this would better function as a 'back to forum_name' link