I'd definitely go down the Roswell Wake Air rack route - they make Nautiques Racks so you know you're getting something of a decent quality that will fit well and look OEM. Simply buy 2 racks and the swivel kit and it'll seamlessly bolt on with very few visible bolts.
As for speakers, you can just about squeeze a pair of pro 80's and pro 60's up there with a ZR5.
The pic doesn't show the ZR5 but we added it days later. there are literally 1/8ths" between everything fowling up so you have to be careful when lining things up. Looked great when done though!