Disclaimer: I'm affiliated with Hobie Kayaks
Disclaimer to the disclaimer: I bought my Hobie before being affiliated
I'm 6'-4" and hover around 225 (235 come the holidays) and pedal/paddle the Adventure. Leg room is not a concern, in fact it excels in that department. Plenty of room. The pedal drive is great and I've yet to experience any problems other than a hex nut loosening once...easy fix. The beauty of the Adventure (as stated elsewhere in this thread) is that it paddles very well. I bring a paddle leash to secure the pedals when they're out...very handy since I primarily fish for bass and spend a lot of time in the kelp. I've spent a lot of time exploring Catalina and our local coastline and the advantage of long distance trips with the pedals is awesome. The pedals offer other advantages as far as repositioning while casting/fighting a fish, etc.
As for fishing for the pelagics, I can't offer you much input. If you're concerned about the extra weight of a 50# fish, I can say that a big cooler/livewell filled up + myself still works out just fine. If you're concerned about where to put it - the lap works out fine, you just have to paddle.
As for paddling, I do it a lot when I'm out at LJ, etc. to switch things up anyway and to save my arms from atrophe.
Here's a little write-up I did on the Plastic Navy site...and if you have any questions about my experience with Hobie, I'll answer them without BiaS, PM me or throw 'em up here.
http://plasticnavy.com/forum/viewtop...c9cb7fedc25147