Companies like Southern Boats, Surtees, Lazer Craft etc have shown the way to get a good ride out of alloy boats. This basically involves a deepish V and a very fine entry on the hull. Preferrably with a decent weight of alloy used. This design does compromise cabin space and stability a little, but for most the improvement in ride quality and ability to handle larger seas is worth it. The Scorpion range appear to me to have a fuller entry and possibly not as much V. A bit more like a Fyran than a Lazer Craft for instance. These differences would tend to make me think that the Scorpion boats are not going to ride as well as the 'better' designed competitors. Doesn't make them a bad boat, just means that the compromise on interior space vs ride etc is balanced less towards the hardcore user trying to go bar jumping or miles offshore.
Regarding the smaller Surtees and peoples comments about poor ride etc, we had a 5.7m Southern for a while and also noticed that for various reasons the basic deep V, fine entry design did not seem to work as well in the smaller boats. It wasn't bad, but it wasn't nearly as good overall as some of the larger models. The 6.7m version of the same boat however has a great ride and nice overall balance. I guess that the experiences mentioned with the smaller Surtees and the smaller Southern would tend to indicate that getting a good balance between ride and usability in the smaller alloy boats is a challenge. We were next to a local pontoon boat manufacturers boats at the recent boat show and I spent 4 days looking at the rear end of one of their ~5.0m boats thinking "this thing must ride like an absolute brick". The interesting thing though was that their ~6.5m model next to it had a much deeper V and much finer entry. It looked like it would ride reasonably well. I assume that they have found using the same 'ggod ride' design rules in the ~5.0m model would have made the space compromise etc so poor that the boat would be less desirable. Hence the space vs ride compromise is pushed much more towards prioritising space.
Personally I would go for a used Surtees, Southern, Lazer etc and go a little larger rather than buy a new Scorpion or similar design. On the other hand, if you don't go out wide and are a bit of a fair weather fisherman, the Scorpion or similar could be great value for you as long as you accept the ride limitations. I would however take note of Denny Boys comments above. A 6.1m boat that can't carry a 115hp engine well (even a 4 stroke) doesn't sound very encouraging.