Choosing between R260 vs. R360 with 3.5" RAID1 (PERC H355)

Hi,

Can't make my mind up between choosing R260 or R360 for a simple 2x3.5" RAID1 using the PERC H355.

In case one drive fails:
- I understand that the R260 is not available with hot-plug functionality for 3.5", so I would have to power down the system, unscrew the failed drive and power up the system again. Would that mean that I would have to wait for the rebuilding of the array before the OS starts or can it wait and be done through OMSA?

- For the R360 which supports hot-plugging 3.5": Assuming RAID1 setup, am I free to use one of the unused drive bays for the replacement disks?

Thanks.