SAN FRANCISCO (05/01/2000) - Prices of big CRT monitors are plummeting--six units on this month's chart are under $1000. Cornerstone Technology's C1025, a new Best Buy, costs just $639--the lowest price yet, and about half as much as several other chart makers. The Panasonic Corp. PanaSync/Pro P110i nabs the top spot on the strength of sharp text, lively colors, and a $50 price drop. A model from Sony missed the chart. Next month, we tackle 17-inchers.