I'm 5'6" 150lbs and I've been surfing for about 4-5 years. I currently ride a 5'10" x 19.25 x 2.35 Sharp Eye, Glide surfboard. I feel like I can go smaller but I'm not sure on what size to go for. I was thinking of getting a 5'8" x 18 5/8 x 2.35 not sure on what model or brand to go for. Any input would be greatly appreciated.

Thanks in advance