Seanlucky said:
Profoto's are great, but they only just introduced a version (B4) with Lithium battery, and you'll pay a S___ ton of money for it. My personal favorite at the moment are the Hensel 1200L Porty's. They're small, light as hell, have quite a bit of control over your A & B channels, and are super well made products. Price point is right, and the cases and pouches that come with their products are really good quality and handy too.
Right now though, I'm really excited about the new Broncolor Move battery pack that was announced at Photokina. I have lots of experience with their Scoro packs, and it'll be amazing to have the same features available in a battery pack.
If you really aren't finding you have enough power at 1200 W/S, then it may come down to a bi-tube and pair of packs. You did say money was no issue after all...
After 15 years with Profotos, both 600 Compact Monos and Godzilla-strength floorpacks and a shirtload of modifiers, accessories, and associated bits, I've offloaded the whole lot in favour of Paul C Buff Einsteins. OMG this is great gear.
http://www.paulcbuff.com
I now have six Einsteins which cost around the same as a 600EX-RT and a boatload of modifiers etc. In the context of the OP, the Paul C Buff Mini-Lithium batteries
http://www.paulcbuff.com/vagabond.php represent extraordinary value. All the PCB stuff has passed the "tough-test" with a couple of years of continuous location work and robust travel in between. A little research will reveal that PCB service & support is unrivalled and I can endorse this. They even replaced an item that I broke...amazing.
Read up.
-PW