If you are into getting a trangia then go for one of the trangia clones. There are other manufacturers out there making trangia rip offs Gelert, Higear I think do them. Someone mentioned the mini trangia for £16! Not bad but Gelert one for £10 RRP is better (also 30g lighter). I'd avoid the mini trangia like a plague. It is not in any way good in the wind.
I prefer the primus eta express over the Jetboil PCS, cheaper and better. They are tougher than you think these two stoves but are just about heating water not for proper cooking.
If you really insist on going meths then the Caldera Cone is really the only way to go if you are backpacking. It is a lot lighter then the Trangia system and you buy the version for the pot you want to use it with. It comes with a can type stove that is optimised to the cone so you get the best efficiency. An example of this is it comes with a tiny fuel bottle and a measuring cup I believe. You are actually supposed to measure out the exact amount needed to cook what you are cooking. Usually boiling a set amount of water for a brew or to rehydrate food. A brilliant system if you ask me.
If you like the look of the caldera cone then I suggest you look at a few sites from the US that help you make them and the stove that comes with the cone. IF you do go that far then you need help as you have just become what is known in UL backpacking circles a "stovie".
I find my primus micron without a windshield uses a 100g can last up to 7 days. That is basically for boiling water to rehydrate and for brews. You bring the ater to the boil then use a cosy off the stove to actually rehydrate the food. Very efficient and minimises the amount of fuel you need to carry.
For these lighter cooking systems I've mentioned look at backpackinglight.co.uk or winwoods outdoors based in Keswick.
I second the honey stove. It is one of the 8 or 9 stoves I have. Minibull designs do some interesting meths stoves if you are interested. Those are for the commited (or should be) UL types.
Love kelly kettles but can't justify the purchase in light of the price / frequency of use ratio involved. Would never carry one on a 10 day backpack or indeed any backpack. Would be good canoe touring though. Although I've heard the drum of a washing machine also makes a good stove in that use.