wanna ask, samsung, panasonic, york, LG, trying to get cheapest/performance/durability ratio, going to use for office, requires 3x1hp.

Samsung at 750
Panasonic at RM830
York at RM790
LG at RM850

All are baseline model, i have been using 2x samsung in my house, an quite okay, cold, nice wind, etc..no complaint, but less than 1 year. Please advice.