eppem;
2018 300 Marlin here. Went up from a 232 Gulfstream.
Great, versatile rig. We're not interested in fishing so it is used for cruising, overnighting at marinas, anchoring, beaching, etc.
It's been in the line a long time and that's important. Grady has worked out all the bugs and it is balanced, handles well and is totally "in tune" with itself. You don't have to baby sit the boat with lots of tab adjustment unless; 1.) Your 280 lb buddy is on the port side along with a full cooler, 2.) You have a quartering wind on the bow, or, 3.) It's rough and you have to lower the nose.
Cabin is great. My sig other and I cook in there, sleep comfortably in the mid berth and it's a big deal to hook up the cable option when we're at a marina that has the hookup option for it dockside. TV aboard is really cool for us; on my earlier boats, we slept in sleeping bags with canvas tops for protection. The Marlin is the Marriott in comparison.
It will be comfortable in seas 2 feet and below. Anything over that powered by 15kt+ winds is safe, but sloppy. Level of comfort will vary from captain-to-captain so I won't debate it here. For us, it's 2 footers and below or we stay in. (Yes, I know long-period swells sprung from distant storms at sea are an exception, but localized wind chop over 2 footers makes for a rough ride and that's what we have in the Gulf off Fla.)
350's are the perfect power for that hull, although, if your looking at an earlier model, that may not be an option. We have the 350's and they are incredible. Cruise numbers are spectacular:
3700-3900 RPM 33-35MPH at 1.3-1.4 MPG.
4000-4200 RPM 36-39 MPH at 1.2-1.3 MPG (High Cruise.)
I don't rev them that high, but 4400-4500 RPM will push it over 40 MPH with ease at 1.2 MPG. I have never cracked the throttles, but I've had it up to 48MPH at 5000-5100 RPM and she's rock solid. I know it'll blow right past 50 MPH. On the other end of the spectrum, I have bumped it off 1.5 MPG with 1/2 fuel load or lower when I have to run at 25 MPH thru Manatee Zones in the ICW.
Obviously, these numbers are achieved in reasonably calm conditions. V8's Baby...
I trailered it to Michigan last summer and while everything went well, I wouldn't do it again. It's a hassle getting permits, stringing "Wide Load" signs on it and putting up red flags & flashing lights. You have to watch out for low bridges, overhanging tree limbs and are legal in daytime only. Bottom line, it IS trailer-able with the right truck, a tri-axle trailer equipped with Electric Over Hydraulic brakes and three 7000 lb axles.
Marvelous rig. We dig ours.