Do you want to stay in the approx same power range?
A couple that come to mind depending on budget:
(all used prices)
$175
Bushnell Elite 10x
$260
SWFA SS 12x or 16x milquad
$450
Leupold vari-x III 6.5-20
$650
Sightron SIII 6-24
$1200
Nightforce 5.5-22