Firstly i'm not an expert on the frequent flyer credit cards and credit goes to AFFer, TonyHancock, who is a Qantas FF, who shared his card combo info with me.
However I tweaked his combo to suite Velocity, since some of the cards he was using were only generous to Qantas, not Velocity.
The AMEX charge card, is that the Platinum original with the 80,000 bonus points and $900 per annum fee? that card is truly worth it if you spend big and travel international and use all up all the benefits it offers...which we have calculated outweighs the $900 fee and the 1.5 FFS = $1 is also nice too. If you are going to get that card, then you'll probably need to ignore
some of the info I post below.
Otherwise depends on your annual spend, because you don't want the high annual fees to outweigh the benefits/points earn you get from each card.
A good starter card for me was the Amex platinum edge $149 annual fee, you get 25,000 signup bonus points (meh), but its the 3-2-1 earn rate that is good. 3 points for $1 spent at supermarkets (including gift cards which you can buy at post offices), 2 points per $1 for petrol, 1 point = $1 everywhere else.
you get 1 free VA flight per annum. complimentary membership to
AMEX Ascent, which has better conversion rate than the normal AMEX membership rewards program.... i believe. In Ascent, you get 1 = 1 ratio many airlines including Virgin, whereas non ascent its 1.5 AMEX membership points = 1 velocity point.
And you get domestic & international travel insurance as well as travel inconvenience cover, which saves me around $390 a year on global travel insurance (which is the cheapest rate, it is normally around $500 a yearly global travel insurance cover). so already it outweighs the $149 annual fee.
If you encounter places that don't accept AMEX, the velocity branded high flyer visa cards, $249 annual fee, you still get $1 = 1.25 points (which is equivalent to the
HIGHEST non-AMEX Qantas FF card on the market, the citibank gold visa business card) So you actually use this over the AMEX Platinum Edge for everything else because you get 0.25 points extra. and you get that 4 free flights per annum offer.
although its a shame this card does not offer bonus points for when you spend with your $$$ with Virgin group of airlines like the AMEX Gold/Platinum Velocity cards which gives you,
2.5 VP per $1 spent and 3 VP per $1 respectively, with Virgin Australia group of airlines.
But i'll be interested to know if you are going to get that platinum charge card, because i think if you did that, the annual fee for diffeerent AMEX card (not talking about supplementary) will be waived.