you have to balance the issues of costs and profits. If you cant convert your galleries quite well a high cost/gb might kill you. At least for that I sould suggest you stuck with a quality freehosting:
www.thunderfree.com
If you do really well with TGPs then go for paid hosting.Check how many Gbs you burn/gallery and do the calculation. Then based on the cost check the available solutions trying to keep with fast but and a good price also.