And an older Malibu can sometimes be found in that price range. And advantage is there were a lot of them, so one can find them for sale in decent shape. I just bought mine lastyear. I think the Response is a great all around boat. Regarding ripping the handle from the hands, yes, that can be done. But the throttle can easily be applied less severely so that does not happen. You do have to watch the bow if it is open bow, when approaching wakes and larger rollers, but that can be learned. And it is not a comfortable long ride over bigger chop. Same as with any competition style direct drive. No better, no worse than the other brands.
Last, regarding a boat that is better for open water that can get rough, my choice is an outboard over an I/O. If skiing is a priority, the slalom wake is typically better than an I/O. Look at 90's to early 00's Glastrons and similar for example. The disadvantage is the lack of really effective swim step. But I personally would choose the wake over the convenience. And outboard will need to be powered properly to give a good deep water start, so no 115's. A 140-150 and up bare minimum on an 18' boat. My family has a family boat back in Puget Sound, and the anti-growth bottom paint my brother put on it (salt water) slows the boat down so it could use more than the 140 Johnson that is on it. And of course, it is not nearly as good a ski boat as a direct drive. For example. But otherwise a very versatile open water boat. IMO an I/O is not better and IMO worse.
Mastercraft used to make a pretty cool outboard boat, but they are hard to find, and may be out of your range.
I personally am glad we purchased our Malibu Response LX used last year, as the compromise works best for us. I just know I need to take it easy across the lake if the wind blows up big at all. I am not skiing or pulling wakeboarders or even tubers if it is blowing up much anyway. And the ski experience is just better. But it is all about what you prioritize most.