Have to move off Arvixe NOW -- Linode? Digital Ocean? Other?
Jamroom Hosting
I get the sense that there are no hard and fast limits - after all, it's "unlimited" - but I get the sense that they are looser on the business accounts than they are with the personal accounts. Unless you run up against some ridiculous limit - or ask them to do something for you which gives them reason to run their utils against your account to spot TOS violations - you're probably okay with everything but storing lots of large backups.
Where you may run into problems is transferring the data. In cPanel there is a Disk Usage command that will tell you how much space is occupied by your public_html directory and the softaculous backup directory.
In order for me to get to the point where they would do the xfer I had to run the media delete tool to get rid of duplicate photos as well as to delete my softaculous backup. This got me down to just on 28GB from over 72GB. My guess is that there was no magic number they wanted to see, they were mostly annoyed at the thought of archving a .tar.gz archive and copying it over. The archive was 37GB on its own so I probably would have been okay with just deleting that and all of the JR cache folders claiming that everything else within the data directory was needed by the site.
I also did the work while on the phone with Arvixe tech support, not sales/billing (press 2). As long as I was actually making some progress and asking questions (as opposed to waiting for the media delete tool to count down from 10,000 twice) they were happy to engage with me. I made six calls over the course of as many hours to schedule the transfer and deal with the minutiae.
The other thing to note is that while you can ask to schedule the transfer, you really do need to call them to put it into the queue. So, early on the day you want to do the xfer, reduce to the irreducible minimum the amount of data you need to xfer. I got on the online chat with them and was able to have them upgrade my account and take all of the billing. If you complain (as I did) about sucky db performance they may give you a free month to "test" the performance of the new server. I made sure to include asking for a Guarantee of better db performance in the upgrade. I also copied the chat transcript and saved it in a file in case of issues later.
SO ... after you put the upgrade request in and slim down the amount of data, get on the phone and call them to initiate the xfer. You will need to update the name servers or the A host record if Arvixe is not the registrar. I went from one server (jxxxx) to another (cxxxx) and I needed to update the nameservers from ns1.jxxxx.arvixe.com to ns1.cxxxx.arvixe.com. The cPanel and FTP passwords should copy over, but if they do not (and they did not for me), get them on the phone and they will reset to a temp password while you wait and you can login and reset them yourself, again while on the phone to make sure everything works.
So, apart from the fact that it took longer because the initial request was denied because they didn't want to transfer the backup - the overall experience was quite pleasant even though I had to wake up three times between midnight and 6am to get on my computer and monitor the situation as I wanted to be back, live, by 6am. Which didn't happen.