To answer your question we need to know which credit card company you are with...as they are all different with their transfer rates and which airlines that you can transfer with.
For example if you want to fly Business Class.....if you are with Amex, transferring to Singapore is very good value IF the routes that you wish to fly on have their Saver Awards( which half the price of the next option, but which are not available to all destinations). SQ are also good for partner aitline awards in the Star alliance in J.
In general redeeming for flights are better value than for other reward options.
Where you migght want to fly..and in which class are also very relevant.