depends entirely on what you plan to do with your connection.

Generally, more bandwidth is better than less bandwidth, but you do start getting into 'diminishing returns' territory where adding more makes such an imperceptible differences.

at 200Mbps the most likely bottleneck will be your own equipment. i.e. your router, your PC, the write speed of your hard drive etc.
The other potential bottleneck will be the servers you download from.  Some servers simply don't allow you to download faster than XMbps no matter how fast your connection is.

If you're the only user in your household, then you shouldn't see any difference in streaming stuff like Youtube, Lightbox, Netflix etc, since you should already have ample bandwidth to stream at the absolute best speed available at all times.  
(if you are having issues streaming on a 100Mbps connection, you might want to flag it as it is probably something wonky happening that shouldn't be)

If you have more users in your household,  then sharing bandwidth has the potential to be a problem if you have lots of people all trying to watch or download stuff at the same time.

We've seen good results on Steam though on a 200Mbps connection,  and of course there are certain bragging rights just from being able to post speedtest results to geekzone and twitter showing 200Mbps speeds :)


P2P also works well for all those Linux iSOs (again, assuming your machine can handle it)


Other potential benefits of the plan also include faster offsite backups e.g. if you have a habit of uploading tons of data to the cloud, then 200Mbps upload will be better than the 20Mbps


(we also do offer 'slower' speeds at pretty good price - 100/20 for only $79/m and 200/20 for $99 - how does that compare with existing ISP?)