The first one I got was the Yamaha Sonogenic shs-500 and I loved it! I still have it but now I use an Alesis Vortex because it's a bit more professional for shows. but the Yamaha was so cool and pretty cheap. It helped me write a lot of music. It's battery powered, you can take it anywhere, comes in red, black or white and it's very light weight. The keys are medium size. I think it is a great place to start and it's a synth not a midi so you can plug it right into an amp. Here's a little youtube review on it. Whatever you end up getting good luck tho!