After todays "little of" I can't sing the praises of Joe rocket enough.
Speedmaster suit is 1.7mm thick leather, out of all the suits I looked at it was the thickest. Armouring is hard ABS type on shoulders knees elbows etc. With double leather and sponge inserts on certain areas.
Alpinestars were only 1.1-1.2 thick
Buy yourself a good helmet from a leading manufacturer, I wouldn't pay £40 quid for a new helmet to save a few pounds, when in my eyes my head is priceless.
Good quality gloves and boots are also essential.
My suit is the same the miguel Duhamel of AMA used last season if i remember correctly.
Also BSB team Virgin Yamaha all use them
hope this helps
Cheers Darryl