Any brand is ok to do the job. Bowens is quite a trusted brand in Singapore photography circle. For small artwork, 500 watt is ok but preferably get the 1500 watt as it would be best to close down the aperture to f/11 or f/16 if you are using a DSLR. Is there a budget that you are looking at?
The 1500 watts should be around S$2200 each or so from Ruby.
Or you could get the Bowens Gemini series. The Gemini comes in a carry case with 2pcs 500 watts light in there, a small soft box, an umbrella, 2 light stands, all for around S$2500.
You may need purchase an additional reflector head for the light at around $80 or so.