we have the OP 6.3 too with a 175 opti too like Gilles. The hull is great in the rough and very dry due to the extra spray rails over the destroyer. Many OPs have the oversize tubes too, meaning even more seakeeping ability, but less deck space! The deep v hull means you need some grunt though, a 130 would cruise OK but it won't be a flier.
With Humber you get what you see. A good hull, average tube material, simple layout usually (other than with the newer leisure ranges) and arguably good value. There are others where the ancilliaries are perhaps slightly tidier but costs will rise. Ribcraft are popular darn sarf, with good residuals and easy sale. Ospreys are very bespoke in their fit outs and the hulls highly rated, but are both more ££. Ribeye and Valiant are not necessarily cheaper, but they typically have a layout more for the leisure user often with sun decks, tables, more seats etc
The Delta and older Avons have some of the best tubes but £££ starts to rise even more. Or just sell the house and buy a Goldfish
Its horses for courses. Try a few. But a Humber OP isnt the worst place to start from! Not too dissimilar to your Tornado really in terms of target market.