Adrenaline V24 with 496HO. 26P Bravo at 4800 rpm hits 70mph.
Can I gain a few MPH by going to a 28P lapped

Give it a try and find out.

probably not, you should be spinning at 5200, try labbing it less pitch and a little more cup

If the propeller is truly box stock, the correct lab process should get you to 5050 rpm and gain you about 2-3 mph.
Give us a call anytime and we can explain the process.

Brett

Find yourself a 26 or 27 Mirage 3 blade.... not the plus ..... fastest prop for that boat

Will a Mirage Prop fit on a XR drive?

as long as its not a solid hub prop

You will just need a HD FLO-TORQ Hub Kit

http://bblades.com/shop/hub-kits/mer...kit-840389k06/

Brett

What prop will be the best overall for my set up?

What area needs improvement , and what does not? I think you should try a stock 23P M+. don't think you have the HP to turn the 25 unless that bottom is on the flat side.