I find the fact that some members are advocating sit in yaks, but have failed to mention that you really need to do a survival course if using 1 of these yaks
a bit puzzling
You MUST be able to do an"Eskimo "roll, you MUST be able to to a deep water re-entry, you MUST be able to evacuate a rolled yak, right it, bail it out and re-enter it.
Sit on yaks have their short comings too, you WILL get wet, there are a lot of cheap and nasty ebay specials out there that are downright dangerous but people buy them because they don't know better ( I was 1 of them )
Things to consider is length, short ones are a pain in the arse to load on top of your car ( leverage ) and are hard to paddle in a straight line, suggest minimum length is about 12 feet ( 4 metres )
Stability is always mentioned, but is it primary or secondary stability
I know which I'd rather ( and have )
If a sit on yak flips, it floats, end of story, it's easy to right for re-entry
For re-entry you can watch "youtube " go to a beach with 5' of water and learn/practice re-entry
Also please be aware that the various states have different laws regarding minimum safety gear that must be either carried or/and worn
Sorry for the rant and rave but Kayaking IS a high risk pass time and EVERY year people drown or die of exposure.
My suggestion, go to a reputable dealer, probably a "Hobbie" and do a demo of both the paddle and peddle types, then hire a couple of different types, if they are "sit in" types and they don't want to show you how to do the survival techniques go some where that will
Final comment ( yeah I know ) is about cost, and in kayaks you really do get what you pay for. Would you buy a cheap "Chinese " camper for $5000-00 and expect to go all around Australia off road with it,
, no , funny about that, and most of the time your life wouldn't depend on it, but you'll buy a $500-00 yak and your life DOES depend on it.
I rest my case
cheers Keith