Hi Gigi, sorry to jump in.
I do not think the 9.7m is formula, 9.2m will not be big enough for heavy gauges like BD.
I am guessing you had the older iS94 and you are thinking of getting the 2010 iS94 to replace it? Your Hurrican 38 will be fine, but the Select 41 will be a little to big
If you struggled last year in super light stuff, you better getting 9.7m to go with the iS137. But 9.7m to 7.8m is big jump. In Garda the 7.8m is a usefull size to have and I guess you want this size. You might have to get a 7.8, 8.6 and 9.7 to get the best all-round.
If you found the iS111 to small sometimes, then the iS117-75 got to be good for you. Will be good with 7.8m and 8.6m. Plus, if you did have the older iS94, the 2010 iS94 is more "power ride" compared to older model, so iS94 to iS117-75 will be better.
Just my 2 cents worth, Remi will say if Im wrong