If you prefer extremecarving, the 182 x 23 may be a bit too big especially since you are only 70 kg. I have been working quite a bit on extremecarve boards in the last season with the Velvet Pro riders from Russia and we have come up with a few different designs depending on how aggressive you like to ride. Sizes we have been working on are 168 to 178 with widths up to 23 cm. The 182 Monster will still work but may be a bit too much on steep hills as it is just too long.
Sidecuts for the EC board have multiple radii and range from 12 to 17m so if you let me know if you have a preference, I can better give you exact numbers and describe how they will ride. Nose shapes are attached and they are many to choose from. I can easily put any nose on any sidecut you like.
Many graphics to choose from and they are at this link
https://skydrive.live.com/redir.aspx?cid=a13c88c3c638c5dc&page=play&resid=A13C88C3C638C5DC!136&authkey=bWcYcUgVl5U%24
I have also sent a few board pictures but as you can see, it is possible to do any shape.
I can invoice you through paypal so you can use credit card.
Hope the info is helpful.
結果的に、ブルースお薦めのスペック、
T 178 EC 013 XX -5.9+6
となりました。数字の意味は、
I built it according to the information in this message which was 178 x 23. The sidecut is a variable sidecut of 13/14m. It is tuned to your weight so I hope the length is OK.
T= Titanal
178 is length
EC is Extremecarve design
013 means it was built for the 2013 season
XX is your name
5.9+6 is my in house measuring system for stiffness where teh +6 tells me how much decamber was used in that board.