Me thinks (as curious it sounds, since it comes from -my- mouth!), it doesn´t matter if you use a DSP-driven Synth or Software, so i think that you´ll be with a cheapo Master-KB with a good Software in the result more than happy.And good free Software-Synths are more than enough outside there. My experience with VA wasn´t that good, since they´re all more or less cheap build, so when your MKorg/MSynth/MS2K/whatever dies, you´ll have only a piece of unusable Software inside of a DSP. Ok, you -have- something in your hands. 2K for example, nowadays usually not more worth than $300-$400, payed for mine about 6 Years ago over the double price. And their price won´t rise, except those, who are mainly known and much used in the pro-world, but the 2K definitive doesn´t belong there. On one kind seen i like this machine, on the other side i hate it.
I´ll give you the tip: Better concentrate yourself into making good music instead of never ending synth maintenance and correcting bad output signals. It kills your creativity like hell. No question, personally i still hate Software, cause the investment costs for a pro-studio bulild around software is still not cheaper than using "real" hardware and real analogue gear -has- simply a better quality, but meanwhile i say: Better a full analogue setup -or- software. This mixage of "half-analogue", VA and pure analogue equipment won´t work together without problems. And the listener doesn´t matter how "analogue" a sound appears, he only wanna get "included" into the "beauty" of your songs. Additionally, nowadays the person behind the music doesn´t interest no more, cause music has got a "consumer product", not a life attitude or a personal relationship like it was 20/30 years ago. Consider that in your choice.
Greetings
Stef