I need to re-landscape my kitty run. It has the most horrible variety of invasive Bermuda you can imagine. The stuff creeps, crawls and climbs, strangles the vines and other plants and in general makes a pest of itself. Questions:

1) If I overseed it with a less noxious hybrid, will the current stuff die out or take over the new grass?

2) If I rototill the area and pluck out as much as possible, could I put down sod - or is this not the time to do that?

Appreciate any advice you can give. I'm open to any suggestions for clumping grass that doesn't need to be mowed (Korean?), but I have the same concern about the danged Bermuda. Would it just take over?