If you're willing to monitor product availability, I would order it from Sweetwater and use your GC for a mic. It's only $40 at Sweetwater.
It's complete for me because it has MIDI in/out, RCA out, and it charges your ipad while you use it. It's INCOMPLETE for a lot of people because it doesn't have XLR in. I overcome this by using a mixer in front of the StudioConnect.
Soooo... in a perfect world, you could construct the following chain:
That drains your funds without getting you any cables. You can aim a little lower and get a SM48 ($30 at Amazon) and have enough room to cover cables and taxes.
To get a good lay of the land in terms of interfaces, I'd shop at Sweetwater and buy at Amazon. It's easier to get a grip on what's out there. http://www.sweetwater.com/c1058--iPad_iPhone_Interfaces/low2high
For ease of use I would use this mixer. Not quite as many knobs but a little more expensive
https://www.amazon.com/Mackie-ProFX-Mixer-Unpowered-6-channel/dp/B07XC3BHTL
For ease of use I'd go with wired microphones instead of wireless.
https://www.amazon.com/Shure-SM48-LC-Dynamic-Microphone-Cardioid/dp/B0002D0HY4?th=1
Some of the cables would change. If you're interested I'll look those up later.
I was once broke and wanted good audio so have bought things incrementally. Now I have a mess of a system 🤔
I want to streamline/simplify/improve my current setup:
Receiver: https://www.amazon.com/Sony-STRDH550-5-2-Channel-Receiver/dp/B00J30GXW2 connected to both my laptop and my PC via HDMI
Bookshelf speakers: https://www.amazon.com/Sony-SSCS5-3-Driver-Bookshelf-Speaker/dp/B00O8YLMVA/r
Headphones: https://www.schiit.com/products/fulla-2 to power a pair of HD 6xxs headphones
Mic: https://www.amazon.com/Shure-SM48S-LC-Microphone-off-switch/dp/B0002D0HY4/ connected to https://www.amazon.com/BEHRINGER-Audio-Interface-1-Channel-UM2/dp/B00EK1OTZC
The desired state is a single/unified tech stack to power my mic, headphones, and speakers. Work seamlessly between both computers, and ideally lead to less desk clutter. Maybe move away from HDMI to send over an audio signal if there’s a better alternative. I would be willing to spend at most $500.