Hi Tiingshii. Welcome to the forum.
Have you read this FAQ on buying your first telescope? viewtopic.php?f=19&t=32
You can google and read the online reviews for both scopes and see which one fits your preference better. My personal bias is Nexstar 5SE over 8" dob for a newcomer in Singapore without access to a backyard/balcony/rooftop and private transport
due to portability issues and not having to worry about collimation.
Whatever your final decision, learn to appreciate the strength of your scope and maximise the hell out of them!