I would be surprised if a stock HD2010 out-threw your X9 setup. If you modded it with a U2 flux BIN and UCL lens maybe it would, but stock I dont think it will. The stock 2010 driver drives the XML pretty hard with a good cell that can deliver ~4A. The 2010 and X9 have very similar reflectors... IIRC. The X9 and HD2010 are the biggest single cell XML reflector designs I know of with reflector dish slightly over 50mm diameter. Someone posted in another thread that their stock HD2010 did about ~40K Lux. Andi did an XML mod to get nearly 80k Lux from an XML... thread here. I am not sure if double Lux equates to double the throw distance though.
Since you're looking for TWICE the throw distance, I think you need to start looking at XRE die projection aspherics, XRE in a big (50mm++) reflector or bigger HID designs. The XML is just not the best coice if you want to put a spot of light way out there. You have to go to pretty extreme measures with designs that may not be very practical physically or financially.
FWIW I have this light on order... they say its overall diameter is 58mm. So I am guessing it also has a 50+mm reflector. I'll post impressions when it arrives, I would not expect this light to out-throw the HD2010 or X9 though.
http://www.easylightbuy.com/mxdl-sa76-cree-xml-t6-led-5mode-flashlight-torch_p2456.html
