Haha good luck on not spending money on plastic
Actually...im in the same boat. I need to stop too...which is why I am hesitant to add a new mold like I did today. I have yet to throw my FD, but I'll report back once I do.
As for Valks - I LOVE the 3 that I have (all from the same run). I don't know if champystar discs are a fluke or what, but they are grippier than star and champ (in my experience), fit right in between champ and star with durability, and seem to have a little more dome to them. If anything, they look cool too. You can tell which ones are champystar because if you hold it up to the light, you can see through it...but it's more than just having light come through. You should be able to literally read something through the disc. Anyway, I can't really say anything about any other Valks, because these are the first 3 I have ever thrown. I love them. They are my furthest reaching disc, and are incredibly reliable.
One thing about Archons - unless you find an understable one, they can still be pretty beefy. I had an understable Archon which worked great for hyzerflips, but it would fade really sudden and I would lose D. I prefer Valks over Archons because they need less height (assuming an understable Archon that won't fly well on a lower line) and fade much less because they are a slower disc. But that's just me. I'm sure someone with a stronger arm could take a more stable Archon and bomb with it.
Good luck with your bag! Looks like you are off to a good start. I would suggest slowing things down to speed 9/10 if you can. I dabbled in the faster stuff for a while and really did not benefit at all in terms of distance and accuracy. Take my 13 or so pages on here as a lesson and just slow your bag down...haha I wish I had done this sooner!