Check out the table I made here: 30 - 115HP Motor Comparison - #7 by Zika
Suzuki 60 to Yamaha 70 is minor weight but depending on your builder - there is a price jump.
Going from either of those to a 90 is where you see the weight pop up.
I think a lot will depend on the hull you choose as well. Maybe figure out the hull and layout first, then decide on power plant.