To me the beginning of mid level is what I have, 3-340se's, 2-200se's, 2 hsu vtf2's,, then the top of mid level would be something like Sierra towers with horizon center, sierra surrounds, with dual vtf15's and separates. Low level would begin with what I quoted above the jamo set with a single sub and a denon, yammy, marantz ect avr, entry level would be htib...
then high level would take a considerable investment in the $1000 + range...
I see a lot of people start with an htib and end up tossing it within a few months... Spending $500 vs $200 is not a huge difference for what you get to start with... That jamo system can keep you happy for a long time, knowing its better than the basement...