Havelock is established and trusted,  but before you make a decision I would like to suggest you look into Crypto-Trade - link is in my signature.  Their securities platform is really new and has opened this week and allows a security to be listed in BTC, LTC, XPM or PPC,  but they have been around for some time as a currency exchange for the main crypto currencies and fiat which would may useful for your arbitrage. It would be my preference now over havelock as it has the advantage that dividends paid go straight to account ready for my own trading on the site without the need to transfer/withdraw.
The interface is also alot more familiar to those that have used BTC-TC/LTC-Global.  It is also not US based/owned/hosted and will not have the problems that those exchanges and bitfunder had.  It offices are located in Hong Kong, which may be of some convenience for you as well.

Like other exchanges it also will allow you choose how much information you wish to provide to back up your identity with eg: passport, address, phone, social networking etc and the users will be able to see this info on site and make their decisions on whether to invest or not.


heres a screenshot i made earlier that shows part of the create security page:
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