Re: After a NSP 7"10, what next?
I just want to point out, for those who don't understand this concept, that not all people live in a place where they necessarily have a local shaper. I know it would be ideal to go and speak with a local shaper, get their advice and see what their best suggestion would be. However, it is often the case that the local shapers are very busy and not accessible, or that someone doesn't have a local shaper at all. I'd be willing to bet that most people who are looking for advice online don't have access to the advice of a local shaper. I also know that my only local shaper makes expensive boards, much out of the range of a beginners quiver.
That being said I firmly believe you should be trying a lot of boards to see what you like best and then make a decision on what you buy. Ordering or buying in a shop a board which you haven't ridden is a little risky if you aren't experienced and don't know exactly what you're looking for. My advice would be to try as many boards as you can, and I definitely suggest the previously mentioned 6'6" Fish idea, I made the transition from a longboard to a Fish of this size as well, and I love it. The best thing you can do is gain a familiarity for the boards, your break and your surfing style. I don't know anything about Southern Swell so I can't really help you there.
If you feel you would really benefit from the advice of a shaper, which you probably would. I would suggest trying to find a small shaper online whose boards you like. Drop them an email and see if you can't get a conversation started. You can do almost as well speaking with them online as you can in person. This is what I did, along with speaking to people at my local break and in my local surf shops.