HEy im 5'9" 120lbs (YES IM SKINNY) anyawys i realy want to buy this board but I dont know whats better a 147 or 150??

Tech Specs:

Length:

142 cm, 144 cm, 147 cm, 150 cm, 153 cm, 156 cm 

Shape:

twin 

Flex:

medium-soft 

Camber:

regular 

Effective Edge:

[142 cm ] 1100 mm; [144 cm ] 1110 mm; [147 cm ] 1140 mm; [150 cm ] 1170 mm; [153 cm ] 1200 mm; [156 cm ] 1220 mm 

Waist Width:

[142 cm ] 243 mm; [144 cm ] 244 mm; [147 cm ] 246 mm; [150 cm ] 248 mm; [153 cm ] 250 mm; [156 cm ] 252 mm 

Sidecut Radius:

[142 cm ] 6.9 m; [144 cm ] 7 m; [147 cm ] 7.25 m; [150 cm ] 7.66 m; [153 cm ] 7.88 m; [156 cm ] 7.97 m 

Stance Width:

[142-144 cm] 19.5 - 22.5 in; [147 cm] 20.5 - 23.5 in; [150 cm] 20.85 - 24 in; [153-156 cm] 22 - 25.25 in 

Stance Setback:

0 in 

Core:

wood 

Base:

extruded 

Recommended Rider Weight:

[142 cm] 85 - 140 lb; [144 cm] 95 - 150 lb; [147 cm] 110 - 165 lb; [150 cm] 120 - 185 lb; [153 cm] 135 - 200 lb; [156 cm] 150 - 210 lb 

Recommended Use:

freestyle 

Manufacturer Warranty:

2 years