For me it's be Strix Halo, 128gb machine, especially running Qwen models. Except when I bought it, it was $1,900, now it's $4,600 for the same box. (Wow that's insane)
For tinkering and learning, it's been great. Tie it into something like Hermes and you have a pretty powerful AI assistant in a box. And when you need to step up your model, you just do something like OpenRouter and it makes it pretty easy.