There is not much of an option to be honest. I've seen it implemented at in SME's where they don't want to have to pay for a RAC license, but it's very rare indeed.
Whatever clusterware you use will do the failover for you (Veritas cluster or HP ServiceGuard). The filesystems will be clustered and failed over in the event of a failure and work like the old fashioned cluster.
You will need to test to see how much downtime you have and if this is acceptable.
Bear in mind that there are licensing implications for this type of cluster. From memory you had the use of the second node in your cluster for xx days or so before you had to pay licenses for that server as well (I can't remember the exact details and this may well have changed anyway). However licensing costs should be discussed with your friendly Oracle sales rep !!