What blender or machine is the best for making peanut butter?

I got this blender.  I couldn't afford an expensive one.  This one seems to be pretty good.  It chops fruit and vegetables well.  It's not a 'heavy duty' blender but it does pretty good.   I chop up my vegetables abit before I add them in and thaw my frozen berries a little.   It does the job.  So you could try this one or I would try and Blendtec or a Vitamix.  The Blendtec is highly tooted but even more so is the Vitamix.  Both are expensive blenders particularly the Vitamix.  But I'm pretty confident you'd be able to make peanut butter with them. 

I've found a message on a message board where they talk about making peanut butter with a blender but some  recommend a food processor so you may want to try that. 

I hope this helps you.  Good luck!