From what it looks like, you're buying via a reseller, but I'm not sure how he can offer 200Mbps SLA as he'll most likely have more than one server under his account... But anyway to your question, I'm nearly sure you're using this server:
Code:
http://www.ovh.co.uk/products/superplan_best_of.xml
It has a 100Mbit NIC, so you'll need any of the Quad Core, Dual Quad Core, or Top of the Range servers in order to get 200Mbps per one server without paying extra.