Definitely second the aircrew socks and gloves. Of the 'newer' kit, the desert boots (Lowa/Meindl) are massively superior to their predecessors. The windproof desert DPM overtrousers were an absolute godsend on MERT over last Xmas and New Year.
Softie jacket and trs (no need for sleeping bag most of the time)
Extreme Cold Weather boots - Goretex lined and warm as toast. Much better than the standard combat high and not too warm even in summer