I currently have a VPS which is 20GB HDD, 256MB Ram, 500GB Bandwidth and cPanel. For this, I pay £24 per month.

The Ram is not sufficient and I have been looking at upgrading it but it will cost me an extra £10 per month to get an extra 128MB.

It has been suggested that as I only use my VPS for web hosting (hosting my clients websites), I should look at Reseller Hosting Packages, so after looking around, I saw one from Heart Internet with unlimited hard drive space, unlimited bandwidth, etc.

Would Reseller hosting really be better for me or am I better off sticking with a VPS/Dedicated Server?

Would this unlimited package from Heart Internet REALLY be unlimited (i.e. would I be able to have upwards of 1000 domains (theoretically) registered?

Thanks