That is a question only you can answer. Have you shot both a 320 and a 220?
Since the two guns you are looking at are very different (full size vs carry, striker vs DA/SA, polymer vs alloy) you probably need to figure out which platform you prefer and what you want to use the gun for. Are these going to be carry guns, home defense, or range toys? Do you prefer DA/SA or striker fired guns? Do you prefer single stack or double stack guns?
If you like the feel of the 229, you should try a 227 carry (if you dont like rails, check out a 227 SAS). The 227 carry and 229 are very similar but if you want a full size gun, you should be comparing a full size 320 to a full size 220 and 227.
There are lots of guns out there, don't settle just because you know of one person who will trade a 220 carry for a M11A1. A used or CPO 220 or 227 can be found for about the same amount as a new 320.
Since the two guns you are looking at are very different (full size vs carry, striker vs DA/SA, polymer vs alloy) you probably need to figure out which platform you prefer and what you want to use the gun for. Are these going to be carry guns, home defense, or range toys? Do you prefer DA/SA or striker fired guns? Do you prefer single stack or double stack guns?
If you like the feel of the 229, you should try a 227 carry (if you dont like rails, check out a 227 SAS). The 227 carry and 229 are very similar but if you want a full size gun, you should be comparing a full size 320 to a full size 220 and 227.
There are lots of guns out there, don't settle just because you know of one person who will trade a 220 carry for a M11A1. A used or CPO 220 or 227 can be found for about the same amount as a new 320.