Gene - I just sold my 1999 700lx to a great guy in Alabama. The boats are solid and well made, depending on the motor they can outrun some 150hp 18fters. That said, like any boat, its up to how well it was maintained, both physically and mechanically if it is a good boat.
I had the 115 Merc on mine, she ran low 50's all day, and a few times a year in the cool southern winter i could tick her to 57 mph on my GPS. But day in day out that was a rock-solid fishing machine. Now to be honest, if you are 6'4" 285lbs the console is gonna be a tight fit. But i've fished 2 onboard in many tourney's with no issue, and 3-4 total if we watched our casting. Great on gas and lots of options to upgrade if you want (Hot Foot, Pro Trip, Electronics, Radio, Lights, SPeakers, water pressure guage....).
Trep