Also, don't know how familiar you are with BBs Obe's - but here are a couple of things you should be aware of:
If you want to have access to your work emails - you'll have to get the BB Plan with BES (BlackBerry Enterprise Service). Usually more money when compared to the BIS side but not by much.
This will also require a commitment from your company since they'll need to buy some software and license in order for the email to pushed to your BB - and depending on how many users they are going to or do have, it can get pricey.
Now if you company already uses BES - then forget what I said and remind them that their company would not exist without your being their on a routine basis.