Anywhere in the south belfast is usually well sought after with a few exceptions.. North Belfast and West Belfast have some very cheap property but for a reason.
Malone rd is definitely some of the most expensive property in Northern Ireland, so if you're buying there expect to pay £300k+ for a small half decent house or large apt but rental potential is good with lots of young professionals wanting the right address on their post and CV's.
A real example of this is that 10 years ago around Stranmillis was all student accommodation with the main streets full of small shops, cafes and the odd cheap and cheeful restaurant. Now its all tendy cafe's, art shops, expensive boutiques and restaurants, well out of students price ranges. So needless to say, young well to do professionals are all living there and this is the result.
My brother has a place just off the ormeau rd, the house prices there have rocketed, also 40% in 3 years since he bought, yet houses 2 roads over are identical and selling for almost £40k less. I find in the city, its a strange market.
Go outside the city in the south and almost everywhere is good to buy. You would wanna move fast though as prices are rocketing with all the new investment coming into the city, the money is being pumped into property by investors.
I.C