I would go for the VIVA,beacause of the reliabilty of the kelisa the viva should be reliable too,good after sale service from UN*MO,and very good petrol consumption.....Good luck
My favourites would be the Sony Ericsson Play and the Neo.....Hmm Android and also my current runner a Vivaz ..... really an awesome phone even with a symbian OS
My personal choice in that budget range would be a ek3 only of I find a good one.....a kelisa,but the only problem is that the second hand market price,compared to the price of a brand new viva is too much.Or a Viva would do.
Viva would be an excellent choice.Fuel consumption is good,and the second hand market is okay..And it could be said as the best buy in its price range...Good Luck with your purchase