Buddy - Thanks, that makes sense. I was concerned when you wanted to get a different boat with the same motor and trailer, was afraid the trailer would not support/fit the boat correctly.
What have they chanced in the last 10-11 years on the 640? I know the seat color/style, trailer (gavlashield), pro seat up front, different dash finishes and I think now they only have 3 instead of 4 gauges. I think Pat is right, the major $$ you'd spend you're better off having your existing boat recarpeted, get some bling bling dash stuff, new electronics, and such, maybe play with a jackplate/prop combo and buy more fishing lures!!