First time track rider, need recommendations

Hi, I've been riding for around 6 months now on my Yamaha R3 and I plan to get into track riding but I've been looking for an upgrade but a bike not too extreme and a bike that can help me progress and build up my skills faster. At this point of time I have 5 options for an upgrade.

• A Yamaha R6 with 1600km for 23k AUD (around 14.3k usd)
• A Honda cbr600rr with 6000km for 22k AUD (Also around 13.7k)
• A Kawasaki Ninja Zx4rr (Demo bike) with 3800km for 13k Aud (around 8k usd)
• A Triumph Daytona 675r with 4600kms for 14500 aud(around 9k usd)
• Or i could wait for the Yamaha r9

Which bike do you think is best for a new track rider? Thanks