Rackspace's prices are insane. $1,314/mo for a cloud server with 30gb of ram, compared to $657/mo for 34gb on AWS.
Plus with AWS you can use reserved instances to get that cost down to $286/mo. Rackspace has no way to get the cost down.
That makes Rackspace cost over 4.5x more when comparing based on ram.
Rackspace prices are insanely high and I can't wait to move off of them.
If you're scenario is more complicated than a single server, you might find our tool useful to forecast your costs: https://my.shopforcloud.com/?guest=true (this link will create a guest account for you so you can play with it quickly)
disclaimer: I'm co-founder of ShopForCloud.com
$657/mo will rent you eight 32G/i7 servers there.
If europe is not acceptable then you should still look into american colos (e.g. LeaseWeb recently opened a US DC) which are not as cheap as Hetzner but will still give you 3-4 servers for the money.
.
...what do you mean lowbrow humor isn't allowed on hacker news?