Miniprep Kit Olympics: Who is the best?

Hi all, it's about that time that I need to figure out which miniprep kit is worth buying for the lab. We've been using the Monarch kits for a while now (we get a good deal with NEB), but I've been curious about other options lately. We do a lot of minipreps in the lab, so a kit that is quick is always best, and being able to get sterile/transfection-grade plasmid is a huge plus.

So far, my ideas are:

• NEB Monarch Kit: We're familiar with it, and we can buy reagents in bulk, though we're not tied to it. $326.40/250 preps
• Promega PureYield: Doesn't look like kit components are sold separately. $454/250 preps
• ZymoPure: Can buy reagents separately. $692.30/400 preps
• Promega Wizard SV: Can buy reagents separately (?). $433/250 preps