Given your experience and budget considerations, there are several great options to explore. My suggestions include:
Yamaha P-45: Known for its Graded Hammer Standard (GHS) action, it mimics the feel of an acoustic piano quite well. Its sound sampling from Yamaha's acoustic pianos provides a clear and rich tone, making it excellent for both practice and small jam sessions.
Casio Privia PX-160: This model offers a realistic acoustic feel through its Tri-Sensor Scaled Hammer Action II keyboard. Its sound engine delivers impressive dynamics, and the built-in speaker system is surprisingly powerful for its size and price.
When selecting a keyboard, prioritize weighted or semi-weighted keys for a more authentic touch and response. This will enhance your playing experience and better prepare you for transitioning back to an acoustic piano if needed.
Another crucial feature is polyphony. Aim for a model with at least 64-note polyphony to ensure that you can play more complex pieces without note dropout.
Both Yamaha and Casio are great brands for entry-level and intermediate digital pianos, known for their reliability and long-lasting products. In terms of brands to possibly avoid, just be cautious with lesser-known brands that may offer cheaper options but potentially compromise on sound quality or durability. Always try to test out the keyboard in a store if you can, to get a feel for the action and sound.
For further research, websites like Sweetwater and Musician's Friend often provide detailed reviews and comparisons that can help refine your decision-making process. Enjoy your journey exploring electric keyboards, and happy playing!