Somee as far as I can tell is very reliable, and if I count for anything the accredited. I tested some of my test accounts I use for testing .net 4.0 web apps and it seems their host servers are still up, just the site is down for some reason.
however, the choice is yours.
@ Your website, Suggestions don't seem to work site locks up and seems not to send. Also, may want to rethink how you are doing this , it won't take long before you are bombarded with spam, You should use open suggestions, CMS like (famous blog software) , cloudflare (free) and some type of approvals, going to be even more work if you have to filter though thousands of mail, and it doesn't take long for that to happen.