2000 5.0L GI/DP w/ 250hrs Genny and trailer $79.9K - Slightly Underpowered with genny but should perform adequately, don't expect to be a speed demon. Should be able to recouple at least 2k from sale of trailer if you have no use for it.
2001 5.7L GSI/DP w/ 150 hrs no genny or trailer $78k - Should perform very well.
2003 5.0L GXI/DP w/ 200 hrs no genny or trailer $79.9k - Should perform well
I would sea trial #1 and #2 checking for how the boat performs; is the level acceptable for you? If #1 works, you are getting a genset which will help later on resale and you are recouping some cost by liquidating the trailer. Used trailers generally sell rather quickly, especially one that will handle a 298 Vista.
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Jvalich
http://www.badcock.com'04 FW 288 Vista "Mental Floss"