I have used both HQ and APQS - I owned an HQ Avante, it is a terrific machine and their customer service is wonderful. I test drove a APQS Lenni at a show and I fell in love, I then attended an APQS road show and decided that I needed a Lenni in my life. I sold my Avante and purchased Lenni!
I will say if you go with APQS definitely get the Bliss table it is incredible!
I will also tell you APQS's customer service is top notch as well!
That's just my 2 cents!