I think that any of those boards in the 125 - 150 liter range would work out well for you as a first shortboard, and that you will probably want to choose mainly based on economics and availability. Although you might lean towards the larger sizes in anticipation of complementing it with a smaller, high-wind board somewhere down the road.
With regards to rigs, if you can only afford one sail I would get a 7.5. If you can afford two I would get a 6.5 and an 8.5. If you can afford three sails I would get a 5.8, 7.5, and 9.5.
I have some advice about board choice in this blog post-