Board size reccomendation & board trends

I'm living in South Korea at the moment, and I'd just like some input of what size board to get. I'm pretty limited regarding choices and nobody is really knowledgable regarding equipment over here.
I'm an intermediate surfer (done some airs, the odd open face reverse and got a few barrels), been surfing for 11 years, on and off. I'm 27yrs old 184cm (6ft) and 68kg (150 lb). My main size has been various 6'2's but for the last 2yrs I've been riding a 6'0 18 1/2 2 1/4 and loving it. It worked great in everything (2-6ft), except when strong winds made the open face very choppy. My current choices are: JS Industries 'Kingpin' 5'11 19 1/4 2 3/8 (single to double with a double flyer round pin) or Weber 'The One' 6'0 19 1/4 2 1/2 (Single conc with rounded square). We're entering wave season here and I'm told conditions range from 1-6ft, rest of the year it's usually in the 1-3ft range.
I don't know anything about the modern trend of boards getting much wider at the nose and shorter in length + I'm a little weary of wide boards since my worst purchase was a 6'2 19 2 1/4 swallow tail (it felt really heavy and stiff) this board was bought before the whole wide at the nose trend started. That 6'2 was just wide in the middle.
I'm looking for a small to medium size wave performance board, and can someone explain this new trend of boards being wider at the nose. I was thinking of getting slightly stiffer and drivier fins as a counterpoint, if I should take the 5'11, or looser fins for the 6'0. In all my years of surfing I've never paid much attention to board dimensions, since I was poor and always got hand downs, so I don't know much about board dynamics.
Thanks everyone
I'm an intermediate surfer (done some airs, the odd open face reverse and got a few barrels), been surfing for 11 years, on and off. I'm 27yrs old 184cm (6ft) and 68kg (150 lb). My main size has been various 6'2's but for the last 2yrs I've been riding a 6'0 18 1/2 2 1/4 and loving it. It worked great in everything (2-6ft), except when strong winds made the open face very choppy. My current choices are: JS Industries 'Kingpin' 5'11 19 1/4 2 3/8 (single to double with a double flyer round pin) or Weber 'The One' 6'0 19 1/4 2 1/2 (Single conc with rounded square). We're entering wave season here and I'm told conditions range from 1-6ft, rest of the year it's usually in the 1-3ft range.
I don't know anything about the modern trend of boards getting much wider at the nose and shorter in length + I'm a little weary of wide boards since my worst purchase was a 6'2 19 2 1/4 swallow tail (it felt really heavy and stiff) this board was bought before the whole wide at the nose trend started. That 6'2 was just wide in the middle.
I'm looking for a small to medium size wave performance board, and can someone explain this new trend of boards being wider at the nose. I was thinking of getting slightly stiffer and drivier fins as a counterpoint, if I should take the 5'11, or looser fins for the 6'0. In all my years of surfing I've never paid much attention to board dimensions, since I was poor and always got hand downs, so I don't know much about board dynamics.
Thanks everyone