dear casparma:
let me help you otherwise. i think you're buying something for the wrong reasons, and you have a high percentage of chance to end with a expensive stuff that satisfy nothing you need. let's see:
- built-in metronome: they have no alternative features (division of the beat, composition of bars). i'll tell you to buy a boss db-30 or similar instead;
- record and playback: although some people find this interesting, you're recording low-end midi. if your purpose is to record study and listen to it, ok. anything else, it sucks, imo.
- speakers: well...never thought about that, and i wonder what would be the result. i would tell you to buy a nice, portable, budget pair of JBL speakers, for instance.
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about the digital pianos themselves, go for a yamaha. the psr-120 is a very interesting model, provide you have a very stable support (otherwise it will shake while you play, and that's really anoying). of course, don't expect "real piano touch" or "real piano sound" because that's talk. i have a (very non-portable) CLP-240, and it's a really amazing
digital piano: it's not a piano by any means. anyway, it's always calibrated and tuned, and this makes me love it!

hope it could help a bit. best luck!