In your situation, for $1600 budget, here is what I would do if I were you. I would get a new amp and improve the CDP at the same time. I would keep the Philips CDP and buy a Benchmark DAC-1 to improve its sound. The DAC-1 is a hot item but I have seen it for sale here for about $750 used. That leaves you $850 to spend on the amp. Since the DAC-1 has a preamp built-in with volume control, you can just buy a power amp and have much more choices. I have seen quite a lot of great amps for around $850 listed here. For example, right now, there is a Quad 909 listed for $825, a Jeff Rowland 102 for $875, a Bryston 4B-NRB for $875, Classe CA-101 for $850, etc... Any one of them will do and they are all great amps.
This setup will sound considerably better than getting the Ah! Njoe Tjoeb 4000 or the Outlaw RR2150 and it will open up much more possibilities in the future.
This setup will sound considerably better than getting the Ah! Njoe Tjoeb 4000 or the Outlaw RR2150 and it will open up much more possibilities in the future.