The Tank007 TK-360 is a good quality and good value CR123 flashlight for money @ around $14.

http://www.tank007.com/view_products.asp?id=338

http://www.dealextreme.com/details.dx/sku.19183

The TK-360 can be used in candle mode by removing the optics in a similar fashion such as a Maglite AA flashlight.

For single or double AA cell use then the Tank007 TK-556 is also excellent value for money.

http://www.tank007.com/view_products.asp?id=341

http://www.dealextreme.com/details.dx/sku.18626