Hi Kevin,
Happy B_Day>> 40 omg you getting old boy... haha, I am in my 60's.. well my body is, damn it.
As to Mixbus... yeah go and get it... btw, if you demo it, they will probably offer it to you for $29 BUT without the FX.. well that is what I did.
As another poster said, it is great for mixing... not sure I like the Ardour engine that Harrison have use to put their mixer on (it's seems clunky but very capable and another workflow to learn) but bounce/render/stem (whatever;)) and mix.. oh YES, it has a lovely sound and a real 1970's/80's vibe about it.
It does seem like it uses CPU but that seems to remain fairly constant if just using the mixer and it's inbuilt FX. Harrison do state that they are always running, so it's not a big CPU hit on my system...
Anyway... the old saying>> "taste and try before you buy", I had the demo for a few months and eventually cracked... $29 or $49 is really a no brainer for this quality!