you can also try the Tamrac Velocity series -
http://www.tamrac.com/Velocity_Video.htm
available at a few places in Singapore - iirc best prices at TK photo in SLS.
things i like about this series vs. other bags :
weight distribution is very comfortable - shaped and padded sling makes movement smooth and carrying easy
designed for quick 'on-the-go' access
nylon interior - less flexible for customization of interior dividers, but sufficient for most setups and, IMO, MUCH better vs. dust
front and top pockets for accessories
style doesn't scream 'camera bag'
several different sizes to fit your collection (6x,7x,8x,9x,10x)
reasonable price (under $100)
used a mk.1 7x for about 6 years, about to upgrade to the new model 8x
otherwise of the other options listed, i'd also recommend the domke. looks good, durable and decent price/performance ratio (if still a little ex.)
i prefer crumpler for the backpacks as usually they are heavier and 'over-built'. good for when you are feeling kiasu about protection - bad for everyday use