We just bought a nitro 189 fish/ski. Awsome for the whole family. Its great for fishing...i can actually troll in shallow about 2.5ft of water and at the same time, the hull seemed to be designed to create alot of wake which is a good thing for skiing or tubing. Has alot of compartment ie., rod compartment, live well, cooler...etc. The motor that came with the boat is a 2stroke 115 hp optimax merc. With a full load, kind of sluggish. Definitely go with a bigger 4 stroke motor. Also comes with cd player w/ ipod jack, foot control trolling motor but no depth finder.
Whatever you pick, you have to decide if it will be:
1. mainly more for fishing or for the family. If it is more for fishing than what I just bought will be good.
OR
2. you have to remember that if it is more for the family, then you would try to look into something that has alot of seating and a hull that will create alot of wake for skiing. With that being said, you would need a bigger motor and gas dont come cheap. If you do alot of skiing you waste more gas. I fill a 30gal tank for about $100 and last me about 2 days worth of skiing/tubing not including the oil ie...$30/gal per full tank. So I would go with an I/O motor...easy maintenance or a 4 stroke for more fuel efficiency.
GOOD LUCK!