Hi Adam,
Like you I wanted to change to a trailable size offshore boat and downsize from my Arvor 21 to avoid marina fees and running costs. In the end I went for a Raider 18 which is a fabulous boat for trailing and getting offshore. I would expect the Warrior 175 to be very similar, however, one thing that I soon found with trailering an 18 footer is that my front wheel drive Vectra was useless on wet and steep slipways. It was OK for a 16 ft boat, but that increase in size makes quite a difference, I now have a 4x4. Unless you already have one, be warned!
P.S. Ive just joined PBSBAC so if you go for the 175 I look forward to seeing you out there next year.
Gordon