If you are willing to back off the lumen requirement a bit, you can save a good deal of cash.
the itp A1 uses a CR123 or RCR123 and is rated at 190 lumens (using the CR123). It is around 25 bucks. You can get the stainless steel version for 32 bucks, minus 10 percent at goinggear which is rated at 203 lumens.
You will have to make the call if youd rather have titanium over stainless steel for some extra cash (65 bucks for a quark mini 123 ti), or would rather get a light that is driven a bit harder even.
Some RCR123 runs at 3.7V, vs the 3.0 volts of a primary CR123. As such, an itp A1 with an RCR123 would be a bit brighter than its rated lumens using a CR123. Note that some lights do not support RCR123s though.