IG window unit having triple silver coating and dielectric coating on opposite sides of glass substrate

An insulating glass (IG) widow unit comprising:

• first and second glass substrates;
• wherein the first glass substrate supports a low-E coating and an angular reduction dielectric coating on respective opposite major surfaces thereof;
• wherein the low-E coating comprises first, second, and third infrared (IR) reflecting layers comprising silver, wherein at least a first dielectric layer of the low-E coating is provide between at least the first and second IR reflecting layers comprising silver, and at least a second dielectric layer of the low-E coating is provide between at least the second and third IR reflecting layers comprising silver;
• wherein the angular reduction dielectric coating, which is on a side of the first glass substrate opposite the low-E coating, comprises a plurality of alternating high index and low index layers;
• and
• wherein the low-E coating and the angular reduction dielectric coating are configured so that the IG window unit has an LSG value of at least 2.0, and a ΔC value of no greater than 3.0 as viewed from an exterior of a building in which the IG window unit is to be mounted across a range of angles of at least 85 degrees from a normal viewing angle which is perpendicular to the IG window unit, and
• wherein ΔC is defined as
• ΔC=[(a−ao)2+[(b−bo)2]1/2
• where “a” is an a* color value at the normal viewing angle, and “ao” is an a* color viewing angle at the off-axis viewing angle, “b” is a b* color value at the normal viewing angle, and “bo” is a b* color viewing angle at the off-axis viewing angle.