Look what I just stumbled upon. GW Instek's newest function generator:
2 regular function/arb channels up to 60MHz 10Vpp into 50 Ohm, 20Vpp in high-z load
1 pulse generator (5Vpk into high-z load)
1 RF output up to 320MHz
1 power amplifier (12.5Vpk / 1.6A max)
According to the specs each channel is isolated (42Vpp max. to ground)
The price for the best model (MFG-2260MRA) is around 1000 euro ex. VAT.