I've sort of locked myself into Bontrager racks since my favourite quick release trunk bag is one of theirs. My only issue was that you could only use a trunk or panniers but not both.
Until now:
My LBS got the new Bontrager Backrack Deluxe. After they can confirm which size I need I'll go pick one up tomorrow. Separate rails for the Trunk and panniers. Also more room for j-hooks / bungees near the bottom. The lower rails are at the height of the rails on the old rack, so the trunk will sit 1.5 - 2 inches higher.