You want a small glass boat go for a formula, or the same hull used in the haines SF485. a legend hull. VERY popular and well sort after still do this day in Aus.
but likely out of your price range. my old one use to do 80kph through a chop.
with a good bilge pump, nasty days will feel a little safer in the low freeboard, but i dont think id feel any safer in a mac. the mac is just more stable, the glass hull will be a smoother ride and likely less wet imo.
$5k will get you a bottom end sea nymph 146, or a top end v13 with a newish engine. ive seen the v13 used as spearfishing boats.
a lot depends on experience and obviously not going out in 20 knot+ days, which i wouldnt go out in any boat to be fair, i hate wind.