I mainly walk in the Tassie highlands (during summer and winter), but also spend time in coastal areas surfing and i'm planning a trip to south america next year, which will include tropics and desert... So basically I want a 4-season tent suitable for alpine conditions, but with enough ventilation for summer use and and light enough for an extended (several months) backpacking trip.
It needs to be 2-person and my price limit is about $1000AUD
So far I'm interested in:
Wilderness Equipment First Arrow 30d (3.4kg) ($795)
Mountain Hardware Spire 2 (2.38kg) ($848 with footprint) ($799 without)
Black Diamond Stormtrack (3.18kg) ($889)
Bibler Tempest (3.26kg) ($1029)
The price of the WE is attractive but it's also the only one that isn't free-standing, which i'm a bit dubious about... Also very interested in the Bibler, but i don't have any experience with single-skin tents so not sure how it would handle hotter conditions?
Any advice or experience would be well appreciated

Cheers, Nick