luring bream,
good luck with your engine selection, it's a tough gig i went thru only a few months ago.
Prior to sellecting your engine you really need to determine what you want from the engine....ie. offshore trolling, fast acceleration, top speed, efficency, low speed plaining offshore, etc as most engines can't give you everything.
For example, I heard of someone that had a etec fitted to their boat, but after only a few outings had the engine removed as the tourqe curve of the Etec made the boat dangerous when crossing bars and would not provide a good offshore plaining speed around 3000 rpm. However this may have been great for a ski boat??
So my advice is do your research on your needs, potential engines and props and hand over your hard earned cash when your ready.