I have owned both Henri Lloyd and Musto offshore. My Lloyds were the old style pre-Gortex/breathable fabrics but indestructible. My Musto's are lighter and more comfortable - no feel for idestructablility as they are only 2yrs old now. Both are great suits get the one that fits better. As far as harnesses go, get an inflatable lifejacket with a harness, you are not working bow on a 50' ocean racer - you are doing a delivery, the climbing harnesses are more comfortable if you are doing acrobatics at the bow and up the mast -- you should not have to do either on a delivery.
Safety is the driver, the inflatable lifejacket with whistle, strobe etc is more important and having the harness built in is that much better. Also don't forget a good tether -- ideally with two leads [on short one long].