If your use case is mainly read-only, then SSD choice isn't too critical. Just make sure that your paging & swap files are on an appropriate device, as are any log files & databases that get written a lot (MySql, MariaDB, SQLServer etc.)
I should have been a bit clearer about wear levelling: memory blocks are not copied in this process, they are remapped, so WL does not ipso facto reduce the life of the SSD, rather that good WL is absolutely essential to the longevity and reliability of the device.
Note: only buy reputable named SSDs from reputable suppliers. There are a load of fakes around and a tonne of false claims on some well-known sites.