I have 4 pairs of these trousers and they are brilliant,
but they do come up large I am normlly a 33-34in and purchased the 34in initially and had to send them back as they were to large in the waist but 32in fitted me perfectly.
As you have had lots of views with no advice yet I thought I start the ball rolling, for sleeping under a basha in this country I reccomend the following.
A good insulating mat which could be a self inflating or foam type, choice is yours but personally I would go for self inflating as they...
I would go for the best sleeping mat you can afford and if you have any cash left over get a fleece sleeping bag liner, this should give you a good nights sleep as you will be insulated from the cold ground and a liner should give you another season at least to your sleeping bag.
These are good jackets they breath well and if you use the pit zips you should not overheat, the only problem I have encountered is in heavy rain you will wet out with water running down your neck as they dont have a hood.