shop's name is Gordonmax
you can get a 2 carat flawless rock for <RM3k

nope, got myself a Hearts on fire rock from habib

had a great look on what they offered, all are D color and flawless rock, looks great if you want to impress people

habib has plenty of settings of which you can purchase, i opt for a three prong setup
else you can bring the rock to your favourite goldsmith and ask them to do for you

IIRC i got the rock at 6-ish k, couldnt remember exactly what was the price i paid
you can goto wahchan/habib in bigger shopping malls (KLCC/Sunway/Midvalley), they do have loose rocks for sale, so you can choose the 5Cs according to your budget
IMO it's better to go for a better cut (IE 3EX) than opting for a higher grade colour/clarity as better cut will make the rock shine better

also, opt for GIA certified rocks instead of IGI rocks (there are plenty of articles around about the stringency of rock grading)