Hi Lynn, sorry for missing your post earlier!
As BIg Air points out !33 litres is quite a big board especially for your weight which I believe is around 70kg.
You should have no problem uphauling it or getting planing on it. Unless you plan using big sails (8.0m plus) you will probably gain very little on the early planing front from going bigger than this. However a bigger board will cut-down the 'sensation' and maneuverability to some degree. A 133 should cope with up to 8.5m with no problem and even bigger at a push.
I think from how it sounds 133 would suit you well. Whilst we havent tried the Techno 133, you may be interested to read our test on the 118 here: [
www.boardseekermag.com]
Let me know if you have any further questions.....