I knew you were going to mention a guitar amp! SOmehow every person that posted a question about Korg MicroKorg in this forum wanted to plug it into their guitar amps.

IN short: NO, it is not a good idea. Whilst guitar and bass amps can sound fantastic when used with what they were designed to be used with they are not at all made for synths. There's some math behind this but generally speaking the inputs on guitar/bass amps (in essence preamps) are just too low fi to handle a synth.

Although you could always plug your MicroKorg into a guitar amp to make it sound muddy and distorted or simply give the sound a slightly different character. NOt a standard practice though. Just do it as a special thing.

If your computer is up to specs I don't really see any need for the MicroKorg then. Soft synths let you do so much more and as long as you have patience for mouse clicking (instead of turning real knobs. Although you can control nearly all the parameters of software synths with hardware controllers) then perhaps taking the software route is a good idea.

-ED-