brand new (to me) boat

[badfish88]

so, im in the proccess of gitting rid of my boat (classifieds) to make room for a 2002 angler 20' c/c, it has a bimini not a t top, fwd live well, 2 helm chairs, 60 gallon tank, and a 125 merc salt water. it has no trailer, so im lookin for one. im new to c/c's and was wondering if any one here has any tips on a boat this size, and or the merc 125's ive had a 25hp and a mariner 200. also at a cruising rpm how much range should i expect. one web sight i found the guy had the same boat with a 150 and said he can get almost 400 miles..........that seems like an awful lot. thanks guys