Cheapest for the clear? I haven’t heard the mg yet, so I can’t say too much, but going off the normal clear, at minimum I’d want something like a jot 2 + modius. Ideally I think the place to be without breaking the bank is the rnhp + bf2 combo for something neutral-natural and very capable without being over the top, or a little labs monotor + a used bryston bda 2 or holo cyan pcm a bit more neutral clean slightly analytical.
You can go higher and get rewarded for it, but you would be pushing the 2-3k ish range used with perhaps a violectric v280 + soekris 2541 (around 2k used for both) for something more studio neutral with a bit of warmth and extra space, xi broadway + schiit yggdrasil a2 (3k used) for something more warm, wide, bodied, and impactful (or swap the dac for a dangerous music convert 2 for really great grip and control with more neutral signature), or lta mz2 (w/ lps if you can find one) + veridian utopia sirius or exogal comet plus (around 3k used) for something more organic, rounded, decently linear and intimate. You could probably work down prices here by swapping to different dacs if needed. These are all combos that worked pretty well with the clear, but I can’t comment on how the mg responds and I can only go off the assumption it’s somewhat similar responding to source gear