Time for a new boat

I have decided its about time to replace the only boat I have ever known. I basically inherited the boat, my dad had it before I was born. Now i have to add I'm in my mid to late twenties now. Right now I have an early eighties Crestliner tiller I think roughly 16.5 ft with top of the line electronics. I have a love hate relationship with this boat, it has done its job and served its purpose I have had some amazing days in this boat, it has been a very dependable boat and I can only think of two times it was in the shop with problems. But the layout sucks you are constantly tripping over something, the motor doesn't have electric and I feel like I'm going to seriously injure myself someday just trying to start it. It is a simple bare bones boat, no live well and next to no storage anything that seems high tech has been added since I have taken over.  As I start to see new boats and have fished in other boats my hate for the boat continues grow exponentially at times and I think its time to get ride of the old son of beaver den.

So my point to all this was to get some opinions on what you guys like about your boats. I'm from Bismarck and primarily fish the river, but I would like to get a little bigger boat since Oahe has come back up, and I spend a few weekends a year at Audubon or Sakakawea. I would prefer it not to be a tiller but would be open to it if it had a good lay out with with plenty of storage. I'm really curious on the thoughts of fiberglass vs aluminum. I don't know anyone with fiberglass and haven't been in one but I recently came across mid nineties yarcraft that I really liked. I don't know alot about the difference in these two types other then the material, so some feed back on that would be great I also wanted your opinions on buying new, I don't have the forty thousand to drop on a new boat and boat from about 84 is new to me ha ha. Like I said I fish the river primarily it wouldn't be used for a recreation boat hardly at all if ever, but you never know. I posted awhile ago wondering about starweld by starcraft, I saw it at the scheels fishfest or whatever it was and I really liked the lay out of those boats and the price wasn't to bad either. So any opinions on any boat would be awesome.

Also if you don't want to read all that, basically I'm just wondering your thoughts on what type of boat would be good for me in Bismarck.