SB900 vs SB910

[Derek300Savage]

Hi folks ,

Im in the market for a new flashgun ive got a good sigma and a metz but was considering buying a 900 and keeping the metz or sigma in the bag as a back up or second unit
ive read a few articles recently about the 900 having overheating issues , should this concern me or have these been isolated one of incidents? or do I spend a little more for the 910 ? Any feedback would be greatly appreciated . many thanks .

Derek Savage.