i need to replace my HVAC system . what is the best system for heating and air conditionig?

i have a 2000 sf home, split system. with avg insulation and dual pane windows.... i would prefer an energy efficient model (90 afue, 16 & above seer...) i understand that their are many models and brand..... however i want to invest in the best ... does consumer reports offer their suggestions this year ?

what about air purification systems? i have terrible allergies.