Great! I'll make sure they run a 10 gauge the way you describe. I had it installed by a local sound shop here in Northern California. This is the first Mini they've installed.
The speakers were straight drop-in swaps. Yes, crossovers are in the doors.
I'm not crazy with the sound, just yet. I'm having them remove the Hifonics amp to replace with an Eclipse (Fujitsu Ten) 5-channel. You can see specs (no picture) here: .
http://www.eclipse-web.com/products/amp/36501.html
The MB Quart front speakers use titanium tweeters. They sound kinda hot. When they're done and I get the sound balanced, I think it'll rock.
MiniBil