The _latest_ Ubuntu version supports UEFI secure boot, so in essence you won't have to worry about it if you get a newer GNU/Linux kernel with UEFI support. If you install / and swap on the SSD, you don't need to put /tmp in a RAM disk. It will reside on the SSD and the difference from ramdisk will be minor.
But do remember to activate SSD trim! (It's simply adding a couple of lines into the /etc/fstab file.) I know some newer distros does this automatically (OpenSUSE AFAIK), but just check it yourself.
The most important one is 'discard', but 'noatime' will also reduce number of writes to SSD. It's all about increasing the longevity of the SSD.