Please do not rely on any flashlight to help you much in a tough situation [unless it has an attached pepperspray or stun gun]. The "Temporarily Blinds an Attacker" is way oversold, especially in the hands of a layman.
Tigerlight makes a very bright rechargeable light with a pepper spray dispenser for around $100, but it is large and heavy as compared to most of the Surefire product line.
Surefire makes excellent high-end flashlights. The E2e is an very good small sized light under $100, but it doesn't leave many options for expansion. The C2 is a bit larger and is also more expensive but it provides more opportunities for expansion.
The Surefire L4 is a great little 5W LED, but beware that Surefire is getting ready release L5 and L6 in the near future. You may want to hold off if your interest is in a LED light.
I suggest you read about the various options in this forum and the various review sites until you feel ready to buy one, then go out ... and buy all of them!