Having a soft-spot for the Leafs, and watching Kaberle since the late 1990's - all I can say is that he'd arguably be either our #1, or #2 Dman on the team.
Mack, and Puffy could both attest to his talent; Kaberle is a 60 point guy with the right team - however he'll never see those numbers if he stays with the Maple Leafs...Getting him would mean giving them either Kronwall, or Stuart (personally I think Burke would rather have Stuart).
I am probably in the minority but I actually wouldnt mind Kaberle if Lids retires. We would need a veteran...and Raffi doesnt seem to embrace that role. In terms of Defensemen that are good puck movers at a reasonable price (he made 4.2 mill last year) he is not a bad option. We play Raffi 6 million and some of the guys that are in Tomas's caliber are making 7 million (thinking of Campbell and Redden- both GIGANTICALLY overpaid) No one is going to replace Lids...but I am sure he would come here and take a little less to be on a winning team.
Kaberle has averaged around 40 points a season the last 5 years playing with no real secondary d-men until the latter part of this year but he was hurt for a time.
If Burkie wants to deal Kaberle, I doubt he wants anything from Detroit that he could get (like Pavs or Hank)- he wants to clear up capspace so he can sign the biggest UFA-Kovalchuk.
I could see Burke wanting Kronwall, or Stuart - although you could be right in the fact that he'd maybe rather have a 1st round pick for Kaberle, and that way he'd free up some cap space in order to make an offer to Kovalchuk.