I currently ride a 6'9 shortboard. However, it is really more of a big wave board so it's a bit hard to carve on smaller waves and with summer comes smaller waves round here. So I am thinking about getting either a fish (like maybe an NSP) or a 6'2 Spider 407A http://www.safarisurfco.com/content/view/22/73/
The spider is definitely a better board but the cost is also a factor. BTW, I am 5'10 weigh about 65kg and have been surfing about a year (but probably 4+ times a week).