Need some advice with Invision Power Board

Alright, I really need some advice here.
Let's begin with the fact that I have 2 sites that I want to merge together - WITH IPB 2.3 forums, using the IPB account. So I want users to be able to login using the same user account on both fusion sites and ipb forums, and be able to comment on news articles images vote on polls rate stuff and do all the user functions on both of the fusion sites fully, using the ipb 2.3 accounts. same thing goes to the forums themselves of course.
Also, I want me to be able to go into the php fusion admin panel still (duh).
Yes, I know it has to be a mod coded...there actually is one, which i'm planning to use. No point of making sure its exactly what i want (as i listed above) because its the only one.
But thats not my point. My point is, V7 is releasing soon (when is it coming out again?), and i would obviously want to upgrade, but of course i dont think i would be able to use that mod to integrate the 2 sites and forums like that.
What should I do? Should I integrate them now and wait for V7 and then panic on how to upgrade with all the ipb messing around fusion's feet or de-merge or do something to make it all work? Or should I wait for V7 and then beg someone to code an integration mod for PHPFusion 7 and IPB 2.3? I'm really not sure,

Heres the link to my site, just in case. As you can see I have 2 of them.
http://1191adb.com

IPB is 100% needed, and using different accounts for everything would be totally stupid - but not using IPB isnt an option, since i bought it and it's like the core of my site, there are specific mods that need to be installed for IPB that will make up my site. (yes the mods interfere with the user accounts but that should be no problem since the sites would use IPB ones).

Thank you!

-Ed