Q: How to avoid retaining "portable" class C?

I realize this is a little too non-operational for the list, but I stupervise a 750 desktop net with a portable class C when I haven't lost myself in the pub. We use about (approximately) 6 of those 253 useable addr's. I could cut that down to 4, I think. I don't think we're worthy of the cross-ISP portable subnet. The company is nearly 100 years old (in Canada!) but we just use email/user surf. Can anyone share advice about how I might communicate "this is generally bad 'cause of BGP table size" issues to a non-technical manager..? This individual thinks our netblock is a continued reason for his/her employment, as per usual. Off-List replies would be appreciated. (416) 432-4334. Anytime. -- Scott.