Hi, I'll have to give the Sabre another thumbs up.
I've been running a Kitesports Centre in New Zealand over the past year and have just returned from our Snowkiting Centre in the Southern Alps. The Sabres were our kite of choice for the season for both school and personal use.
It's a great all round kite and ideally suited to snowkiting, landboarding and is great in the buggy as well. It has a good balance of performance and stability, something which is particularly important in the mountains.
In terms of lift, for snowkiting I think they're absolutely fine, like the other posts state, they don't have 'blade' type lift as they're relatively low aspect but offer more than enough for anyone with a little self preservation ;-) The trade off with the slightly lower lift is the increased stability, smooth power delivery, depowerability and predictability, which if you're snowkiting you'll really appreciate. For snowkiting in mountain terrain they are perfect, lift isn't the pre-requisite here, stability is generally more important if you want to boost off the slopes. Too be honest if you're jumping off the top of a 30 degree slope you don't actually need that much to stay in the air for a long, long time :-) They also have a good/effective safety system, but like most other snowkites to date the release toggle is too low and can be difficult to use when face down in the snow.
Even on the flats, whether landboarding or snowkiting you can still boost big, you won't out jump a blade, however I think for most users the trade off is worth it.
Out of the 3 sizes I agree the 9.5m offers the best wind range, speed/power compromise, however the 7m is great for higher winds and for the beginner/intermediate that doesn't want to be too powered up. The 11.5m is obviously the slowest of the bunch, but when it's powered up you can get some nice big floaty air and for a large foil it turns and performs nicely. I've also been using the 11.5m and 9.5m on the water a fair bit recently and really enjoy them - just don't crash!
So to summarise - great depowerable foils, with very good all round performance. For snowkiting they're great for all rider abilities as terrain/wind strength will dictate the air you can get. For landboarding they're great for most levels but for big air you'll need to be powered. For buggying they're great, I've only used them half a dozen times in the buggy, but am really happy with them for general use and freestyle.
Good luck and have fun!
Cheers
Stuart
www.kiteaddicts.com