deciding between 3

Thanks grizz - I'm not quite on THAT tight a budget however.  Here are the finalists so far:

1) Silvonic
Pros like the u- shaped diodes for extra surface area and smooth surface. Also like the low power charging for smaller particle size. Really like the PRICE - $199

Cons no stirrer, no higher charging option for external use. Most comfortable doing pints instead of quarts.

2) Silver lungs
Pros the 7 gauge diodes, low and high settings should be able to make low particle silver. And higher for speed and external use. Easy Colloidal option too.

Cons starts at $300 not including TDS meters etc.

3). Silvertron Elite
Like the Troy ounce diode option, like the customizable current, more advanced auto shutoff, option for higher ppm.

Cons: Starting at $359 with the Troy ounce diode. Ouch. But still considering...