Has nobody replied to your Q?
I have a number of Hensel Integra Pro Plus monolights myself, I like them a lot, but I prefer their various Porty heads, (EH Pro P, Mini EH Pro P) because of their compact robust build, and portability.
Though you need 300 watt modeling lights to shoot effectively indoors, so Monolights work best, Unless cost is no issue, then I would take the newest Lithium Porty pack with the additional AC mains unit, and standard EH Pro Mini heads that have 300w modeling lights and fans, then you have the best of booth worlds. The cost of a Hensel Porty Lithium 12 + AC Mains + 2 Mini heads = $6,000.
The newest Hensel EH Pro mini speed LED heads, (not seen in the U.S. yet) have LED modeling lights that advertise to be as bright as a standard head, but portable? I will have to see to believe.
I understand Hensel's Expert D 500 monolights are outstanding in every way, Lighter, under 1 second recycle times, and 3X shorter flash duration of the Integra Pro Plus. If you plan on using your lights until they are dead Hensel is impossible to beat, Light Quality, Build Quality cupeled with their prices.
The only draw back (IMO) is Hensel's resale value here in the U.S., it is about 35-50% compared to Profoto & Broncolor which have 70-80%, so if you think you will ever move on then the Profoto D1 500/1000ws Air-S monolights are the best of the best. The Air-S wireless system is also usable on all (2014) current Hensel Lithium Porty and AC Nova packs, also the Expert D500 mono's.