I love my Lowepro EX-180. It was the very first gear bag I purchased back in 2005. Since then, I've also owned a Sonicase but found it to be a little too bulky so I sold it and reverted back to the same EX-180. It's been a workhorse with a ton of different configurations in it over the years (multiple mics, LDs/SDs/micros, ua5>v3>pmd661>v2>tinybox, etc...not all at once, of course). Now, my rig is super "low-pro" (pun intended) and the bag is almost too big.
Unfortunately, they're discontinued but there's a new one on ebay right now for $25/shipped.