Opinions please - Stratos, Renken, River Ox

I'm still shopping for a boat to use in the intercoastal waterways of NC. I've ruled out a few and have a few more to look at. I'm looking for opinions on the following:<br /><br />1990 Renken 1880 with 80hp Merc O/B. The boat has had the floors "redone" and it looks like the same stuff they used on my fiberglass bath when it was repaired. Lots of spider cracks in the gel coat too. I'm a bit leary of this one.<br /><br />1987 Stratos 20' CC with 200 hp Mariner. I haven't seen this one yet, but am not familiar with the brand. Sounds like a decent boat from talking to the owner by phone, but over priced according to the NADA book.<br /><br />River Ox - All I've got is the ad and am waiting to hear from the owner. I don't know this brand at all.<br /><br />Looking for some good constructive comments here as I'm new to the salt water world of boating. You won't hurt my feelings by making things simple