It's all down to Personal Preference BUT,I've been on a Few Boats with Tabs and I DO like the extra control /options they give...Noticeably in a Head Sea when they help nail the Nose down,...also with some of the Long Cruises I do 100+nm.... The amount of fuel used I have (225ltr tank=nearly Quarter of a Tonne)...and consiquential shift in Weight ect, is noticeable and Tabs DO give you more control.
That, and the fact that I have managed to procure a (Hardly used) Hydraulic set at a very good Price means we'll suck it and See!
I will put my Honest evaluation on RN when I have given them a good try out
As to NEEDING them I probaley dont NEED!.. Ulmanns-Tilting Hydraulic Helm-Wing Backs-Fusion Ipod player-LED Nav-lights-Deck Lighting-Double A-Frame-Wear Patches-InConsul Lighting-ect ect ect...Nice to have though!