umm for a offshore boat id go with a center console for sure,more room, easier to maneuver the fish around, less cluttered and its just a tad bit easier to dock...NOT sayin a cabin boat wont do thats my opinion....
As for brand...i like the old mako 26 c/c with twin 2oo mercurys,the newer fountian c/c with twin 2.4L offshore merc motors, the proline 29 grand sport c/c with twin 300 verado's 4 strokes, or the great old classic.....Grady white 30 c/c with twin 300 verado's....
The best type of offshore boat is the one you can maintain mechanical and fits the budget you have..Have full safety gear at all times and make sure there UP TO DATE...
Your 15 you can jump on peoples boats and sea what fits your style then when your ready to buy you"ll know what your looking for...............