I am considering purchasing a 29 fever. Hoping to find something 2005 or newer with less than 100 hours. What is the top speed with twin 6.2's. Any reason's not to go with this set up.

I cant help you with the speed out of that set up but I think the big question is what are you going to be doing with it as for big lakes or out in the big pond. I have a single in mine and I am never far from a shore line if something were to go bad.
But as for the cost of ownership I would think twins are going to cost a lot more as for the maintenance. And if you work on your own boat then it is real nice to be able to sit next to the motor back there and have lots of room.
My 2ct

70 - 72 mph is what you will see with twin 6.2's in a newer 29 Fever. Not quite twice the amount of fuel consumption of a single, but not that far away either, considering the lack-luster performance, twice the maintenance (you're looking at close to $200 to change oil, filters and drive oil), and if you ding up a propeller there are two of them to have repaired/replaced. Twice the likelihood for engine problems ... the 6.2's are known to eat IAC's like candy due to heat soak, but they are relatively cheap (~ $80 each) and easy to replace. And, when you try to sell it, low price and dismal resale prospects.

A single 500EFI (~ 74 mph), 575 (~ 80 mph) or 525 EFI (~ 78 - 80 mph) makes a lot more sense in a 29 Fever unless you have some special reason for needing twins. The only twins I will have again will be in another 35 Lightning Twin Step, or maybe a 38 and they will be blue one's for sure .

ive got twin 454's boat which will do 75ish

I'd stick with a single engine in a 29 Fountain. The boat will be much better balanced.

500 hp single is fountains recommended setup. for power to weight and cost of operation. lots of extra cost in twin setup for what you get out of it.

Single 29 is the way to go!

Check out Shogren, they have a boat that fits what you are looking for.

I'm with you on all of this. I have a single 2 7 and the only thing I worry about would be stranded in High surf w no power.. But for the majority of use that does not matter.Also a single sits high in the water in the rear unlike this 32 w twins.

Which makes me think. I wonder what One 1200 hp Chrysler would do in a 32?