tandem family/fishing recommendations

[pbb]

So I have a single fishing kayak for myself, but I am thinking of getting a tandem, mostly for the family, but also for possible occasional use as a solo fishing yak for friends.

I'm looking for your suggestions. I'm not interested in spending a lot of money and I'll be looking for something used, so I'm looking for models that are commonly available. So no, I'm not going to get a Jackson Big Tuna. Or for that matter a Hobie. I'm not looking to spend any more than $500. I know I can get a used rental Malibu Pro 2 with seats and paddles at that price.

Since I'll be looking for a used one, feel free to suggest models which are discontinued, if they are still commonly available used.

So I guess I'm asking which general purpose tandem would make the best "loaner" solo fishing kayak (without major modifications)?

Malibu Pro 2?

OK Malibu 2? Malibu 2 XL?

Cobra Tandem?

Others?

Anyone have any intel on when the next OEX Malibu blem sale will be?