If you are considering a M11 Sunwayman then a Solarforce is WAAAY too big IMO for a pocket torch.
I also think 1000 lumens is not likely, not real lumens. An XM-L is possible of this output, but only when driven hard. The two issues you face are batteries and heat.
The most you are likely to get in a 1 cell (RCR/14500) is 500-650 lumens, but as a rule these are not currently regulated and heat up really quickly, so you can only use them for small bursts.
I guess this is another thing, do you need long constant run times? Bright lights running on MAX will get hot, so many cannot be used continuously in this manner. But a lot of budget lights use poor PWM to produce lower settings. This might be an issue as it can cause a disco like strobe affect on moving objects.
So you might want to consider proper current regulated lights, but this means most will not be budget offerings.
The Sunwayman V11A and V11R are awesome lights.
The Niteye EYE10 is similar and slightly smaller:
£48 on ebay: http://www.ebay.co.uk/itm/Niteye-EYE10-Cree-XM-L-U2-LED-260Lm-Magnetic-Control-CR123A-Flashlight-Torch-/110932161717?pt=US_Flashlights&hash=item19d41274b5
The EYE15 uses an 18650 instead of an RCR, so is a bit longer, but much longer runtimes:
£52 on ebay: http://www.ebay.co.uk/itm/Niteye-EYE15-EYE-15-Cree-XML-U2-EDC-18650-Flashlight-Titanium-Pocket-Clip-/330769206188?pt=US_Flashlights&hash=item4d03618bac#ht_2267wt_952
£38 from LedFire (use CPF8 for a discount)
£45 (CPF8 for discount)
£47 (CPF8 for discount)
These are all good current control lights and high quality.
However there are loads of budget lights in the $10-30 dollar range. Too many to list. However if I wanted a light to depend on, I’d be happy to spend a little more.
If you don’t fancy Li-ion batteries, and you want to stick with AA/Eneloops, then you’ll need a 2AA light to get 240+ lumens out of. Any 1AA light is going to be more like 120-160 lumens max.