I've got the 9'10 Allwave, I'm a true OFB at 125kegs and it feels just right. At your puny 105 (

) you should try the 9'6 version, I think you'll be pleasantly surprised.
Over on the 'zone, JimK and Supthecreek are the authorities on the big boy Allwaves, they are nice blokes, accomplished surfers and generally happy to answer PMs with specific questions.