As justame said, check the upgrade prices.
I had a site with 100mb for $17.00, but the next "package" up was 250mb for $59.00. I found a host company that offered 250mb for $39.00.
Has anyone here thought of hosting in NZ (thats New Zealand - West of Australia - owner of the Americas Cup (eh eh) )
Last I checked, the US$ buys around $NZ1.85.
If interested let me know, I use two companies who are reliable and honest, so there would be no problems using your credit card online, and if there was I would sort them out.
Only down side would be speed, we have the bandwidth, but it runs at high capacity during our daytime, which is 20 hours ahead of LA. Could be good for large personal sites.....
Thought I would mention it in case it helps
Have a look here
for one of the hosts I use.