Tires for staggered 20" wheels?

[DaveNW]

I posted a few questions the other day in the Tire Rack forum, and realized afterwards that wasn't the best place for my questions. So now I'll try it here:

First of all, I know virtually nothing about tires and wheels. Please help educate me about this stuff.

I'm interested in getting 20" Beyern 5 wheels and suitable tires for my 2003 4.4i. I'm seeing very similar pricing between vendors on the wheels, so I've pretty well decided on a local tire shop. Their price is about the best I've seen, and there are no extra shipping costs involved. Plus mounting and balancing is built into the price.

The quote I've gotten from them includes Toyo Proxes tires. Someone said there may be a better choice than that.

So here are my questions I'm hoping you guys can help me with:

1. Is there a better tire choice than Toyo Proxes for 20" wheels? (Please name names, so I can get specific price quotes on them.)

2. What would you consider the best tire/wheel sizes for staggering? Someone said 9.5" on front and 10.5" on rear, but Beyen wheels come in 8.5" and 10". Does the tire size follow the wheel size, or is there a different number I should be looking at.

3. I have OEM mudflaps. Will they interfere with 20" wheels?

4. Is there aything about getting 20" wheels and a staggered tire placement that I need to be aware of?

I'm looking forward to getting these wheels and tires within the next week or so. Any advice you'd care to share?

Thanks,
Dave