Solid state drives make a big difference in performance with PCs, but the advantages may be negligible with a busy web server.
VPSblast.net is located in Canada, so there would an SEO disadvantage for sites with a focus on any other country. I think they know that. Their web site is evasive regarding their server location. I could not find any address for the company on their web site, but their site IP is Canadian and their WHOIS confirms a Canadian address.
"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote." -- Benjamin Franklin