Dual-purpose or strictly street?

Let's face it, most people who own dual-sports ride 80-90% of the time on the pavement. There is a big difference in power output between a 650 single and a 650 twin. So it comes down to a choice between versatility (a multi-surface mount) and performance (more than adequate speed and handling). The SV650 is less than $1000 more than the DR650 and is more comfortable for long highway stints. Would I want to give up on exploring dirt roads? Decisions, decisions...