I ordered a DRO as well, so my hope has been that the vise and clamping kit will come in before the machine is ready to go. Keeping my fingers crossed!
I'll probably stick with R8 collets for now because I like how low-profile they are. I'm planning on doing some work that may stretch the Z height available, so I'll need every inch I can get. A lot of my workholding accessories are also quite oversized for the machine, so I need to save Z height to accommodate that (e.g. sine table, dividing head). I've been eyeing a spindle lock from Priest Tools as a way to make tool changes easier to make up for it.
I'll definitely have some stock to play with once it gets here, although I've exhausted my fun budget for the next few months...