The PQ website says that boat can have up to the 496 Mag HO motor which will run 61 -65.
www.powerquestboats.com/custom_build.php?boat=8
Select the model then hit customize this boat, then select your engine option.
I have a 95 270 Laser with similiar hull no steps weighs 4800 lbs with 454 Mag (385 hp) it runs 53-58 depending on how much fuel, passages, gear & waves. All in all it is a great boat which handles 2 to 3 foot waves well. I added tabs as it keeps the bow down more in bigger waves, plows right through. I usually cruise at 3000 - 3200 rpm at 30 - 35 mph. Yes, I do wish it was faster. I also added gaffrig red line gauges and corsa silent choice, removed the mufflers all for about a third the cost if ordered that way from the factory. I had Dave Lamer of Advantage Marine Service in Zeeland install everything. Dave used to build boats at Powerquest so he knew how to install everything and make it look original. He let me order all my own parts thus avoiding mark ups. I was able to my tabs from Boat Leveler - Insta Trim directly. I order a customer 12 x 16 style which is tappered towards the end which kinda looks like a K-plane. I'm just trying to give you some ideas of what you can do to make your boat the way you want.
There are an aweful lot of nice used boats out there. I would consider buying a bigger used boat that is within your budget. Find one thats been stored out of the water and indoors all year and it will look pretty close to new.
If you go the new route you can defiantly track down a lot of the expensive options and add them later for a lot less. All the canvas covers and camper tops are made locally in Holland as well for a lot less than through the factory. Good luck!