Where to begin?

I have been using LB for awhile on Windows and Palm Treo 680. It works OK. I think I've outgrown it, though. The interface on the Palm is a bit cumbersome in that there is not a way to see a weeks worth of appointments like there is in the Windows version and scheduling is a bit of an effort.

I am thinking of switching to iPhone. I also am thinking of using ACT! to track clients, partners, opportunities, etc. It seems that LB is not a good place to keep all of this stuff because of the nature of histories.

So, if I use both ACT! and LB here are the questions:

1. Am I nutz? Is this too complicated to do effectively?
2. Will I be using two calendars, one for LB and one for ACT! and trying to balance them?
3. My business is a service business. So I need to schedule both sales/marketing meetings with partners and service estimates/appointments with clients. Which calendar should I use for these events? This is on top of scheduling the REST of my life (which LB does just fine...)
4. ACT! has an iPhone app named iCLink and uses a wireless sync service between iPhone/iCLink and the ACT! desktop version (ComanionLink). iCLink has a proprietary calendar and todo list. Will this integrate or remain separate?
5. Has anyone in the community tried this yet and can shed some light?

Thanks for the help.

Wayne