In reply to TOS:
> (In reply to Pete23)
>
> I'd take a strong one...
>
>.. one very windy night did damage to the tent.
>
>
> Whatever tent you go for, I'd suggest getting snow valances fitted - not because of snow, more for using big rocks to pin the base of the tent down.
Yep, +1 to all that.
I've done it twice. The 2nd time with my gf we spent a night at high camp around 6000m (near White Rocks) and our Bibler Tempest was lifting up in the air and thrashing around. In the morning some of the attachment points were partly ripped out and it had generally taken a hammering. A lesser tent might have shredded. We found it hard to get enough big rocks to guy it to, and a Bibler has no valences, which would have helped.
I used a Hberg Jannu on Peak Lenin last year and it's a good tent (long) but funky low door means the floor underhangs the roof lip, so snow/rain can drip down into the inner.
Aconcagua (normal route) really is an easy climb, but it's a serious place - especially above 6000m in bad weather - and you need a proper tent, if only for a couple of days.