South Island Day Walks (Winter) ?

Hi All We are currently in the early stages of planning a ski trip to the South Island for late July and are hoping to incorporate a couple of day walks. Is anybody able to suggest any 'must-do' walks that fit the following criteria; * easy/medium difficulty * do-able & safe in winter * excellent glacial or mountain views (i.e. rather than urban or coastal) * approx. 2 - 8 hours duration * not requiring 'technical' equipment or expertise (i.e. beyond appropriate clothing/first aid/standard supplies/'common' sense) * within reasonable driving distance of either the Christchurch or Queenstown areas (although willing to go further afield if warranted). Would the 'Hooker Track' in Mount Cook N.P. fit this criteria??? (Background: Coming from Australia, reasonable level of fitness, previously completed several long day / overnight hikes in Tasmania and in the Blue Mtns NSW). Any recommendations are greatly appreciated. Many thanks in advance. K.