If you do decide to take it on with you, be sure to either have the original receipts showing serial numbers, or register it with customs before you leave. Otherwise you could be charged duty to bring it back into the country.
Personally, unless you are in a catagory 1-2-3 stateroom, you will probably find storage to be tight to begin with, and that much more would be that much more.
Another option--kind of weird but could work...take it to a Mailboxes etc., and ship it to yourself right back to that same Mailboxes etc. They'll charge you a small fee to accept and hold the boxes for you.
Anne