Simonton 5500, Lansing windjammer 80, Alside Sheffield HELP

[bobtu]

Thermal industries triple pane (not sure of model number yet) = $750 a window (Alenco)
Simonton 5500 = $650 a window (independent guy)
Alside Sheffield = $540 a window (independent guy)
Windjammer 80 = $360 a window (independent guy)

All prices are installed.

Thinking of getting 11 double hung and a couple of 1/2 moons installed. Was thinking of leaving the existing 7 double pane picture windows on the east side of the house...

Current windows are about 10 years old (same as house). Heating is $170 a month and cooling is $250 a month (both level pay). Windows are drafty and the ones on the west side of the house are of course hot. I live near Kansas City.

Trying to understand if the difference in cost is worth it.

Any comments or suggestions???

Thanks a ton!