Re: case prep center
I do have a Giraud, but a couple years ago I got an RCBS Case Prep center for pretty much the same reasons you mentioned. Flash hole deburring, primer-pocket uniforming, brushing the insides of necks, and case mouth chamfer/deburr on small batches or when the Giraud is setup for something else (or I just don't want to haul it out).
It quickly became one of those things that I wondered how the heck I'd lived without it for so long.
I will say... I've replaced the RCBS chamfer and deburring cutters with Lyman VLD ones, and there's a Lyman flash-hole deburring tool installed on there too. If I was buying new today, I'd look real hard at the Lyman case prep center instead of the RCBS, assuming I could get it with the above attachments.
YMMV,
Monte