[In-N-Out]

I'm looking to purchase a Nakaya as a gift to myself. I have a few MBs but would like to venture off to another brand and it seems like Nakaya is well regarded here.

Any recs on specific models? I have EF and B nibs already from MB, so I'm pretty open to all types of FBs. Are there any flagship models/nibs you recommend?

Also, any specific shops you would recommend in Tokyo to get the best price?

Thanks all!