If you want minimal price, go with the 8a, for most performance the 9 pro or 10 pro.
The 9a comes with better build quality and one more year of updates (always 7 years after launch)
Here two articles to help set it up
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nostr://nevent1qqsg5vs07t0y7q5jw3tak264mt5f984enp4dkh2d5ygwx2dsx7sjzfgpzamhxue69uhhyetvv9ujuct60fsk6mewdejhgtczyzm7669svt0xkjsju50a22zurc0qa589z2xd4yatzx6p2z64a5e0cqcyqqqqqqg0q7qk3