My 2c worth.
Go to a 50L kettle so you still have plenty of head space to avoid boil overs especially if you do end up using a coil chiller, you leave the chiller in the kettle during the boil so every thing is sanitary.
The reason you will need plenty of head space is because as it starts to boil, the hot break (protiens) will foam up quite a bit.
On the subject of Copper coil chiller.
My kettle was/is a heat exchanger for my camp shower (get the keg boiling & pump water through the coils to the shower) So, I have 16M of 3/4" copper in mine & it is way over kill. (cools from boiling, down to ambient in less than 20 Min in winter) Infact, because it was originally designed to be full of water & I'm now only filling it with 23L of finished wort, it now only contacts less than half my coils.
Consider using around 6 - 10M of 1/2" or 3/8" copper & the cost might not be so scary.
Burners,
I'm sure that the Rambo burners are very good but not worth shelling out nearly 200 bucks in my opinion.
I use a "run of the mill" cast iron, 2 ring burner from any good camp shop, it takes 30 Mins to get my 19L of sparge water from ambient to 90 + deg so for about 50 bucks, that's fine with me! & gas consumption seems to be a little better than others have mentioned on here too, a 3 ring burner of the same type might be worth consideration but I already had mine so I didn't bother buying another.
As for tipping hot water,
I use my kettle for heating every thing, this way I only have one burner, one hot metal item & it does not move.
I simply heat my strike water in it, then dump this into my mash tun then lift it onto a bench to dough in,
45 Mins into the mash I start heating up my sparge water, when ready, I dump this into 2 x 10L plastic jerry cans.
Lift the mash tun up on top of the frame that the kettle sits in, then hang the 10L plastic cans (one at a time) from the roof above the mash tun,.....a 4 tier system!
If you do not weld yourself or know any one who can, you go to a plmbing supplies & get an out let which can be fitted with only the need to make a hole in the pot/kettle/keg.........Oooops, did I say Keg, shame on me!!
Edit:-
One other piece of kit to consider is monitoring temp.
I started out using a digital meat thermometer & soon got sick of cooking my hand every time I took a reading so I bought a dual probe digital K type thermometer, very good investment, this way you can monitor both your mash temp & the sparge water heating up at the same time with just a glance & the push of a button to select which one you want to see.
Something like this.
http://cgi.ebay.com.au/Digital-K-J-Type ... 3a625f585cHope this helps, Mick.