Hi Jabbran,
To the wishlist:

1) The larger the hull, the higher the speedpotential, how fast it goes depends on the motor and battery selected.
2) The larger the boat, the better the visability, modern radio's have more range than you can see the boat at...
3) There's no such thing as RTR, the boats are assembled at best, and usually not very good, you have to check every bolt and secure it with loctite, check for leaks and repair them, lubricate the shaft and check the overall set-up.
Best is to have an experienced boater prepare the boat for you to avoid nasty surprises such as a flipped boat sinking on it's maiden trip, because you were not told to tape the hatch shut prior to running the boat... (no, the clever rubber surround and the one touch button to close the hatch doesn't mean it's watertight, not by a longshot...)
4) see above.
5) more capacity (mAh) usually means more runtime, more runtime means more heat in all components, more heat requires a working watercooling on ESC and motor. Stock 'RTR"have 6-10 minutes runtime, depending on how you handle it.
6) Speed costs, size costs, battery capacity costs, so a commercial 'RTR'is a compromise.
7) Reliability is, next to good components, mostly a matter of maintenance and sensible handling


What's with your obsession with runtime?
If you want to run your boat longer, bring a second battery to the waterfront, or a third is you must.
Or have the charger with you and charge the drained battery on site, using a car battery as powersupply for the charger.

Please share your thoughts on the subject of runtime...

Regards, Jan.