Suggest some gud UPS

I need to buy A UPS 1000VA (600W) pleease suggest some gud UPS which has adjustable options like adjustable charging current etc.which battery i should buy for 600w UPS?

There are many imported ups are available in that market like homage, inverex, auto stac, i read package box of auto stac inverter stated that autostac have 3 way charging system for fast charging. i don't know anything about this only pros can brief u better..