Fairly new to streaming. Where to start?

Aralic Vega has streamer and DAC

Not true unfortunately, the Vega is DAC only, albeit a very good one.
Auralic Altair is the streaming DAC unit at just $1700 brand new and about $1000 used.

Lumin D1 or D2 is a streaming DAC too, possibly all you need.
I kick myself still as I was offered a D1 for $1000 and turned it down.

BTW Many of the streamers/ Dacs in my list have a 30 day $$$ back warranty (if bought new) Obviously not when used. I'd still considered used though

Another concern is to have a digital coax out so as to hook my CDP into. Also, I only have 134 inches allotted space in my rack now. Depth is normal. The DACs on my list will fit in the space but some I have crossed off because they were too long for my space. That may have been the case with the Lumin

The Benchmark DAC3 doesn’t have a streamer in any of the variations.
Auralic Aries G1 and G2 have streamers but not Dacs, the Vega G1 and G2 are streaming Dacs.

You should spend an hour two looking into Roon in case that connects with you. There can be different hardware choices in this arena.

Do you just plan on streaming or do you think you will rip a collection of CDs and play them via some storage/delivery option?

Streaming is usually managed with an app on your phone or tablet. Some apps are better than others. Lumin makes a good one. Lumin hardware is also very solid.

Another option is Linn, a Scottish firm that makes high end stuff. The Linn app is called Kazoo. This is what I use. I stream Tidal, Qobuz and my favorite radio stations via TuneIn. The entry level Linn Majik DSM is a one box streamer, DAC and 90 watt amp. It is small, does not get hot and is well supported with updates. It costs $3000 new but there are used ones for less. Just connect an Ethernet cord and your speakers and you are good to go. You can also get the matching floor standing speakers M140s for $3000 which sound great with the Majik DSM. The benefit here is you can also use Linn’s great room EQ system called Space Optimization. 
Cheaper options are SONOS or Bluesound...

I’d recommend the Bluesound for your streamer, then spend the rest of your budget on a good DAC.