Beware hosting packages offering "unlimited" features -- they rely on the fact that the majority of users end up only using minimal resources, and very rarely actually mean "unlimited", and if you end up using more resources you may end up getting a nasty surprise -- I'm sure you can turn up more information on this with some Google searching. You might also consider looking for some reviews of GoDaddy, as a lot of people have had bad experiences with them, especially if you need a lot of support or later decide you would prefer to migrate to another host -- I'm not saying don't use them, and I'm sure there are plenty of people who like the service as well, but do your research!

I always recommend Media Temple to people who are willing to spend the money for a top-of-the-line host -- the're blazingly fast, fully featured, and have some of the best customer support I've ever worked with -- although I've also heard only very good things about the above mentioned Bluehost.

...and just in case anyone finds this in search results but has slightly different needs, in my opinion Synthesis can't be beaten for WordPress hosting, especially if you're using the Genesis framework. They're a specialist host though, and won't meet your current needs AT ALL.

Hope that helps!

is 1tb bandwidth and 100gb space going to cut it say 5 years from now if I have over 500,000 members, over 9000,000 threads on the forums and 500 members online at once.

Hard to say -- it might cut it just fine, or you may quite possibly need an upgrade -- but they also offer larger packages than that, so (assuming you're still willing to pay for it) there's no reason you couldn't simply upgrade the plan -- and you'll actually get what you pay for, unlike many supposedly "unlimited" plans where you're suddenly hit by extra charges or have your site throttled when you start using more resources. You might find out more from the operators of larger vBulletin based sites on what sort of resources it uses under different traffic loads if you really want to be more sure about potential future growth.

Honestly, you'll be doing really well if your site actually gets that busy, so I wouldn't let it be a huge concern right now -- you can always deal with it if and when it happens, as long as you choose a host that a) offers viable upgrade options, and/or b) isn't a pain-in-the-ass if you later decide to migrate to a different host, which is unfortunately a known issue with GoDaddy.

I don't know if Media Temple are the highest specs you can get, but their infrastructure and support are both top-notch. You'll have to shop around more yourself if you want to look for alternative options -- let us know if you find any!