Honestly, from personal experience, I'd say keep away from lecturers.... It might seem like something you want, but the reality of the situation is different. Being in a relationship with someone and not being able to tell anyone about it is hard and puts strain on the relationship from day one. Just because the uni has no formal regulations about student/lecturer relationships does not mean that the other lecturers approve and can make life VERY difficult for both parties involved, without them ever breaking a single rule.
Thinking it's some great romance is just naive.