What I would need if I were to go with IP6 would be to have a parallel address for every one of my current addresses. Right now we have 2 - legacy /24's and one legacy /23 - thats it.
I'd just need the "equivalent" IP6 space.
The key question is "are you an ISP?". If the answer is yes, then the IPv6 equivalent is a /32 block. If no, then it depends on whether more than one site is involved, since the allocation size would be a /48 per site. IPv6 is a combination of classful and classless addressing. The result of that is that all allocations are sized to be more addresses than you could possibly ever need in the majority of cases.
ARIN does provide microallocations, but ICANN forced them to put "for ICANN approved root service only" into their policy for microallocations, so that leaves us out.
You fit under "Direct assignments from ARIN to end-user organizations" and should have no problem getting a /48. If you need multiple sites then "IPv6 Multiple Discrete Networks" would apply. --Michael Dillon