I'm going to get a pair of AKG240s, and an MPD26

rather than the APC40 - since I want some nice sensitive buttons to sample and do drum beats on. I get the feeling that the APC40 is useless for anything but loops.
But, I'm having second thoughts now. I'm thinking that I may try and find a cheap analogue synth. Are there any out there for 150-250 squid, or am I dreaming? Shall I be saving up for a NanoKorg? I don't know anything about synths, to be honest. I'm guessing they're heavier than controllers, since I'm going to have to be carting it around the country.
Any opinions would be well appreciated!