Personally I think outboards are the way to go for fishing. They take up no deckspace, they are easier to work on and are way better on fuel. If your trim guage is not working you can look behind you to see how high it is, if you need to beach the boat it is never a problem. One day the starter motor might pack up and if you have an inboard you may have to pull the whole motor out of the boat (from the inside of your boat) to get access. Most importantly, if you have an outboard every one can see how big it is ;)

and are you buying ali or fibreglass?? not sure about funngames comment about easier to work on?? id much rather work on my inboard than an out board!  i have my boat setup so the engine cover is the bait board and also a seat,  it really comes down to personal preference and how much you are willing to spend! the newer 4 stroke outboards do use less juice and are generally cheaper to service.

 each to their own but after having both i would go inboard again if on a big boat. easy to work on and any mechanic can do the job or if you know how you can do it yourself. the tune and service is just like a car motor (depending on motor we had a 350 chev) as far as fuel goes, we were using around 80ltrs for 50nm at an average of 22knts runing at 3000rpm on a 23foot fraser. a lot less fuel than the 90hp2stroke on our 18footer. and as mentioned the engine hatch can be utilised for other things

 < 6mtrs = eggbeater, >6mtrs inboard is a consideration.

Car motor principal = reliable.