What brand of leathers did you try on? By your waist/chest measurements I think a 48 will be too big specifically in the waist. The 09/10 Teknic leathers i.e. Violator/Xcelerator have large stretch panels in the arms also look at the Speed & Strength Twist of Fate suit. Bottom line, try on several brands/models before you decide.
I have a MotoGP black/silver cow hide suit size US 48 (worn twice) and a red/grey Komodo Pro suit size 48 (worn for 1 season) both suits look/feel new. I could let either suit go for a reasonable price however I'm in Korea until Dec so if you can wait......
FYI, I'm 6'3", at the time I was using the suits I was 235-240 with a 38" waist both suits fit very well, the MotoGP has a slightly slimmer cut but still comfortable. Now I'm down to 210lbs/34" waist so the suits are big on me in the mid section.
It's Not denial, I'm just very selective about the reality I accept.