Quoting Liberty Belle:" lots of people have told me that i could use my moby for my almost 3 year old but it was so uncomfortable. ... [snip!] ... a few different kinds. So pretty much any woven wrap would be fine? are they as ridiculous to wrap like the moby or better? "
Stretchies are not supportive for heavier babies and not really safe for wriggly toddlers. Just because the weight is tested not to break at 35lbs doesn't mean it's a good idea, kwim?
You can get 'shortie' woven wraps so less fabric to wrap. With a young baby you have the advantage of being able to do quicker carries. There's lots of different holds and carries you can do, front, side and back. They are quick and easy once you get the hang of it - practice with a teddy or doll in the mirror lol. It takes me no longer than 90 seconds to back wrap my PITA toddler and it was quicker when he was younger.
Have a look on here at the pure awesomeness of them and figure out which you like. www.naturalmamas.co.uk at the babywearing section with all the photos. They have them in category of type of carrier and pics of each brand, style variation and different carries. Youtube is good for tutorials on how to wear them. http://www.lovetobenatural.co.uk/baby-carriers.html?limit=all is local to me but they ship worldwide, they have a big selection even just to browse for ideas.
I'd recommend Ergo as the comfiest and most practical SSC just because it's the comfiest i've ever had. Then a wrap too, depending on your size and height i'd probably go for a size 3 for short carries and to use as a ring sling with a slipknot, and a size 5 or 6 as a versatile carrier for your baby and your toddler.
Try and find a local babywearing group, then you can try before you buy
ours meet 1-2x a month and we eat cake and talk and then they'll let you try things on and talk you through it all, some people will let you borrow theirs for a while too as there's a lot of swapping and helping each other out at them.