Yeah the thing is literally bolt up, really easy to do! Just use new gaskets! You could seal them up but i wouldn't as when it comes time for a clutch change or if you want the exhaust off for some reason it just makes a hassle, just bolt it up nice and tight and it will be fine, they are a direct swap in most cases.
The DBA. RDA etc will all do the job, i have been running stock rear rotors for the entire set of endless pads and the held up fine, the front rotors are endless though..... I would suggest the DBA 4000 series rotor with a decent pad, however i will be trialling the QFM pads as they are cheap and get a solid review!