one word of wisdom from someone who has paddled plenty of slow heavy boats, though my level of experience is not up to par with capers.
if you wouldnt buy your bike from dicks sporting goods, then dont buy your kayak there. if you would...then go ahead. I owned a pair of ocean kayaks for a number of years. they do 2 things really well.
float
ride waves
paddling ocean kayaks in flat water just plain sucks...it sucks so bad that i lived on a lake, with 2 kayaks at my house and water at my backyard and i never wanted to go paddling. A better boat is more enjoyable to paddle, just like a better bike is more enjoyable to ride.
find out if you want a tandem or a single. A tandem has its advantages, and disadvantages. if youre paddling with someone who is not as strong, it keeps the whole experience better because you stay together and arent constantly waiting up for someone in another boat. They are also larger and thus a bit more difficult to transport...but not by a ton. a good roof rack does the job.
kayak material makes a big difference. but id recommend going with something that has a molded plastic shell instead of fiberglass. it will be much cheaper and durable, though a bit slower and heavier. Since its recreational..molded plastic should fit the bill.
once you do more research and see what the offerings are, go find something on the used market. kayaks arent cheap and lots of people end up buying them, using them a few times and then selling at a loss. because they realize that lugging kayaks around is tough.
I hope that didnt come off as snarky. but i know if you go and buy a crappy boat, you wont have fun paddling it and it will sit