Help with a new LED

I have an SL-20X, a Scorpion and a Strion, all with standard bulbs...I also have an Arc AAA and am considering moving over to LED technology in my bigger lights....but I've been out of the loop on all this and not sure what to look for...can you guys help me with a tactical LED in the Scorpion/Strion size that is the best bang for the buck? I looked at the Scorpion already but would like to be schooled a bit on the other options out there....there also seems to be alot of buzz about the Fenix but I'm not familiar with it...thanks.

Since you said "bang for the buck", here you go

http://www.dealextreme.com/details.dx/sku.6923. Cheap Chinese light from dealer who takes three weeks to deliver. But it is my favorite small light. I've had it for a few months with no complaints.

Check out any of the cree 18650 lights on the site http://www.dealextreme.com/products.dx/category.940.

If you want "bullet proof" those aren't them. But some, romisen, ultrafire are surprisingly durable for the money

Can you wait a couple of months?
The new SSC P7 LED torches are just showing up but the better brand names have not got theirs out yet.

Forward clickie?
AA or CR123? (probabaly CR123)

Dereelight might also be a good choice, along with Olight and some Drop-ins.

From Fenix the T10 might be good.

8% off coupon at Fenix Store is "CPF8".