Of the spells that can be dismissed:
Detect Magic is a cantrip and unless you absolutely need to know right now if something is magical, it can wait until you get home / out of the dungeon.
See Invisibility would be worth being made permanent. I like the idea though of a mage having to blink several times to bring up the right magical effect in their eyes.
Enlarge Person would make social interactions harder. Or even just finding a bed to sleep on! You're better off getting a custom magic item made that grants Enlarge Person 3/day.
Telepathic Bond would be great if you're in a social / intrigue heavy campaign. Or if the party splits up a lot. Just be sure to ask your GM if you have a mute button. In case your PC needs some alone time or is in the bathroom.
A permanent Alarm spell is useful if you have a base.
Dancing Lights, for your own disco/rave club!
Ghost Sound, see above.
Invisibility can only be put on an object permanently. I guess if you really wanted to hide something from someone you could. But there are plenty of ways around invisibility that I think you'd just be wasting XP.
A permanent Prismatic Wall, Wall of Force, or Web feels like something an NPC would do. Again, if you've got a home base and you're trying to fortify it, this could be a good choice. Otherwise, I'd pass.
If your party is splitting their time between two different cities then Teleportation Circle is definitely a good choice.
Of the spells that are not dismissible, I would highly recommend Darkvision. Darkvision granting magic items are pretty uncommon and seem to be over priced for what they do. This would be a good choice.
On a side note, I love permanent Symbols of Death. Long long ago, before 4E was even a thought in a developer's mind, I played a necromancer. Now the party rogue loved to play little jokes on the party. And one of those jokes was that he liked to steal my spellbook. Frustrated, I informed the rogue that the next time he took my spellbook would likely be his last as their would be dire consequences for such an action. That night, feigning sleep, I heard the rogue rummage through my items and take my spellbook. I then heard his body collapse in the hallway as he activated the symbol. The party was mostly evil and we decided that leaving the rogue dead was the only way he'd learn his lesson. I did, however, get a skeleton out of the deal.