> BJT's might be more attractive since they are in smaller in through-hole
form,

You can get small signal MOSFETs (TO-92 form factor) -- 1N5486 is an example
that immediately comes to mind.

> but are there any big differences in what I use??

I don't think so, as long as your Vcc = 5V?

Cheers,
Ishaan

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