Replacement for a Shark RSI

[Theaos]

So i have an old helmet (shark RSI) and have just got back into biking after a 6 year break
I used the shark for around 2 years and then its been stored in a wardrobe in its bag for around 6 years. All the padding and foam looks fine so (i know its subjective) but what are peoples opinions on using it again for semi regular use?
Next question is iv been shopping around for a new lid and apparently have an odd sized head -_- The RSI fits me like a glove but apparently no one has a proper range of sharks in stock anymore

Im Riding a GSXR750 so im looking for a sportier helmet if i can find any

my alternatives so far that fit seem to be
HJC RPHA 11 which looks alright but the sharp rating was only a 3 so i don't know how i feel about that
AGV K-5 which has a drop down visor which iv never had before and don't know if the AGV are any good?

any other recommendations from anyone who has had this problem or has used either of the above helmets?

[Maha]

There is a range of Shark helmets at Cycletreads.

http://www.cycletreads.co.nz/product...e_helmets.aspx

If you're looking at HJC, a similar fitting helmet is KBC.