I'd like a recommendation for a homogenizer for lab/small-scale manufacturing use. I know that Silverson is popular here, but I can't find any for sale right now. Is there an equivalent? I see lots of IKA Ultra-Turrax and Polytron Kinematica homogenizers for sale new and used on eBay, but I don't know if they are any good (or as good as Silverson). I'd like to keep it under $2K if possible.