Glow,
the answer is down to one of personal preference on this one, I'm afraid. Are you travelling alone? Could be a hassle getting off one flight and onto another, not to mention the cost. Could you not see if it would be a better option to pay for an upgrade? They are expensive, but trust me, if you have never seen Club (Business) in one of the big scheduled airlines they really are a world away from 'cattle class.' I work for BA and you will get a flat bed and unlimited attention from the cabin crew who will be keen to make sure you have everything you need. Many of the Middle East oil state countries also have fantastic service too - eg Emirates, Etihad, Gulf Air. Cathay Pacific also have a good reputation. For your own sake don't get on a package holiday flight - think of the names of high street travel agents and avoid them. Thomas Cook may be great for a quick jaunt to Spain but Australia is a different kettle of fish altogether.
If you don't have the funds to stretch to Club have a look at the airlines that do an economy plus class - BA do one and while you don't get a flat bed you do get a wider seat and fewer passengers per cabin crew member. Also ask for a bulkhead seat - one of the ones with extra legroom. There is no point in asking for an emergency exit seat because you are not an 'able bodied passenger,' ie you couldn't throw a heavy emergency exit hatch out and assist in an evacuation if it were needed. (I am always amazed when you hear people on programs like Watchdog who bang on about not getting an emergency exit seat because they want the extra legroom because they are poorly. Ermmmm
) Remember they will try and give you a bulkhead seat if they can, but this is where they put mothers with babies in cots, too, because they are the only seats with tables big enough and enough space to put a cot. Worth hanging onto that thought though if you are going on your hols with baby
.
You really only need to break your flight up with a stopover if you think it would make you feel more comfortable. Pick your stopover spot - again, Singapore and the oil states are very civilised, but you probably don't want to have to see a doctor in, say, Bangkok or Saudi Arabia! Many airlines allow their passengers to get off for a leg stretch anyway when they stop to change crew and refuel. My mum went to Australia last year and spent 2 hours in Bangkok and 3 hours in Singapore looking round the shops.
Finally, while I certainly won't be globetrotting for my dinner (I'm going to be an instructor with my own team and project - yey!) the CAA wouldn't have a problem with me being the pilot to Australia at 24 weeks.