I would recommend the North Glos SoT series, I raced my 748 in it at Silverstone last year, they run it combined with the Mini Twins, you may find the top bikes a bit quick like DSC member Garry Smiths 996 and my mate Deano's 998R but Mike will probably be out there on his Triumph and maybe Gary on my old TL. They have several 2 day meetings at Pembrey which as a circuit is a great leveler. And if the big bikes are a handfull don't think Luke on his SV650 will be any easier, check out the results from Darley
http://www.ngroadracing.org/results/...mini_twins.php I will be up at Silverstone this saturday coming and will be watching the Mini Twins to assess the DD bikes chances against them, but I'm only of thinking of taking them on at Pembrey.
I only race with North Glos and New Era and have never been able to race the 748 in there 600 class but then there is no point as I'm several seconds a lap quicker if I use my GSXR600 or R6
http://www.ngroadracing.org/