[Benjamin]

Since it is possible to tune and gap the reeds, would buying a cheap melodica with the express purpose of improving it out of the box be a more economical choice?

I recently obtained a Yamaha P32D and adjusted the reed gaps, and the difference in playability blew me away.
So I was considering buying a cheap 37 key like the Schoenhut via ebay, and modding it; for usage with songs that require more keys.

Is this a good choice?
If so, which melodicas would you suggest?