Headlight assembly melted - replace with OEM or aftermarket?

So I noticed my driver side light was out a few months ago so I replaced the bulb myself with a standard Sylvania no problem. A week or so later, the passenger side goes out.

That one is harder to replace due to the placement of some fixtures, but I thought I had it in well enough and that was that. But I noticed it didn't look quite right so a week later I tried to re-fasten it and I could just tell it really wasn't snapping into place the way the driver side did but felt secure enough.

Anyway, this week that light goes out and I try to replace it and I noticed the bulb was actually broken and pretty much gone. I try to replace it but I simply can't get the new bulb to snap into place. After finally angling to take a look with a light I can see that the casing has been totally burned and melted and that's why it won't fit.

Now I can't tell when this happened, if it happened after the first burn out which would explain why I couldn't secure the initial replacement, or if because I couldn't secure it and it was loose it melted the casing.

Anyhow, I might be able to get the dealer to cover the replacement but really don't want to deal with that hassle as I'd have to fudge about putting in a non-Toyota bulb and I'd rather just pay than lie about something like that.

My question is: Do I pay $250 for OEM Toyota or $150 for aftermarket? I did some reading on aftermarket Toyota headlight assemblies and at least for the Rav4 lots of people saying how awful they are, but can't find anything specific to that in this forum.

I'm just looking to replace with a standard assembly. Any advice is helpful.

Thanks

ETA: 2010 Prius I

 

Thanks for the fast input, guys. I was leaning OEM and I'll definitely go that route without second thoughts now. It's like a plumber once told me: buy cheap, buy twice.

 

Yeah, my neighbor swears he can pop off the bumper no problem and align it etc. haha I'll believe it when I see it. Might try to find a good autobody place to do it. As you can tell, I can't even install a difficult-to-reach headlight bulb, so I'm not the sort to be trusted with removing bumpers!