I'm checking out prices for sleeping bag and can get a good price on a Rab quantum 400 from Outside, it is however a womens model. How exactly does this affect the cut? Is it likely to be O.K for a slim (ish) 6ft dude?
Check the length, womens ones are generally shorter, and it's a standard women's length bag I very much doubt would be long enough for you- I'm 5 foot 5 and my ME womens' bag is a little too long but not that much.
Different model, but if you look here, http://www.equipuk.com/rab_sleepingbags/range_ascent.html
RAB's standard bags are designed for up to 190cm tall and womens' ones are for up to 175 cm (making reasonable assumption that they're the same length across the range)
Cat