Hi Biggun:
To comment on a Seafarer's handling of rough seas:
I had a Seafarer on Lakes Michigan & Erie for years back in the 90's. The boat was a '94 so it had the SeaV2 hull and a 250 Two Stroke "Saltwater Series" Yam.
Obviously everyone's perspective and level of abuse they'll take is different.
Here's Mine:
There are very few instances of long period groundswell in the freshwater Great Lakes. When the wind builds, the results are steep waves with short intervals. After the passage of a summer cold front, the winds usually veer NW to N to NE and then die down after 2-3 days. Then you have residual groundswell that lasts for a few hours that are wider spaced. (There are surfers over Superior and Michigan and Erie that follow those conditions, armed with SUV's, wetsuits and long & short boards. They time their schedules to arrive at a targeted location to catch the swell before it dies out. Look at most Great Lakes Surfing Videos on YouTube; The footage will depict leftover groundswell, sprung from a wind that has died off.) However 90-95% of the time we're talking chop & wind driven waves, especially on the Western end of Erie near the islands.
Anything over 10-15KT winds and 2 footers gets uncomfortable. A 2 foot wave is almost to the top of a Seafarer's gunwale, a little less than waist high if your standing there. Believe me, it's easy to over estimate wave height aboard a rocking boat; I've done it many times. The story gets exaggerated in the re-telling, like the fish that got away. I got caught on Southern Lake Michigan years ago aboard my Seafarer when I underestimated a cold front. I had the waves at 6-8 feet with the rogue 9' and I've been dropping the wave heights every year since. Truth be told, they were probably 4-6's, but they LOOKED much bigger.
Steep 2 footers, driven by a fairly robust wind is not fun in a Seafarer, or my 30' Marlin for that matter. SeaV2 hull or not, it will pound and take spray, especially in a quartering or head sea. On or abaft the beam it's better; The Seafarer is a remarkably stable 22 footer in a rolling situation.
Is it safe? Sure. Can you get home in 5-6 footers? Sure, but if your talking comfort & enjoyment and having a good day on the water, anything over 2 footers is, well, my limit anyway.