Definitely note LDFerguson's comments above about striking a better deal then the norm (in light of the size of the investment), as well as noting all the other sound advice given here, in particular, stay away from teh bank's 'investment advice'.
Consider paying a fee for advice only from an authorised advisor (contact IFSRA for a list in your area), and if you do then invest through them they will refund you the commission. I would be concerned if I was in your shoes and was told by my accountant that Hibernian's Balanced Managed Fund was the best, not because it's not OK, but to put all that money with one fund manager, with one fund, which has not historically been the best performing amongst managed balanced funds (I know, past performance etc, etc, but it DOES help to see how a fund has performed in the past) ....well, its just not diversifying the risk! Is there a close relationship between the accountant and Hibernian, ie, does he tend to put a lot of his clients' business there?
Would definitely echo the view to put it on a good deposit rate, and take your time deciding what to do - many fund investors currently licking their wounds after recent market falls would love to have been on deposit recently! Good luck.