There was a very heated discussion about tripods on this message board several months ago. You can try doing a quick search to find that thread.
I think you are referring to
this thread. I wouldn't call that heated. We've certainly had much, much worse and the most vigorous opponents in those discussions still get along quite well here (or so I think).
Well, based on your 2 criteria of "good quality tripod" and "fitting in a backpack", I guess I can recommend a
Gitzo GT-1541T Traveler 6X Carbon Fiber tripod (
link to B&H) plus the
Really Right Stuff (RRS) BH-40 LR: Mid-sized ballhead (
link).
While that's a great combination for travel (although I think the RRS BH-30 head would match the tripod better in terms of weight savings vs load capacity), I suspect that it is significant overkill for the OP. If I recall, the thread was originally a request for info on more budget oriented tripods.
I'm a big fan of Gitzo and Really Right Stuff. They make great gear. They just don't make very competitive gear for people on a budget. Unless you are a committed photographer, use your tripod a lot, and/or have lots of money to spend, I think they are the wrong brands. It's a bit like suggesting a Lexus for someone's first car that isn't sure how often they will drive.
Unfortunately, my knowledge of tripods is pretty well confined to the high end, so I have little useful advice for the OP. They need to understand that there is a trade-off between price, stability, and weight. Given that they want to stay low on the price side, they can't have low weight and high stability. I would opt for either a compromise or something heavy and stable. Having a lightweight, unstable tripod is more frustrating than useful.
As I've said, I don't know the low end market well, but I would not even bother with a tripod if you can't get something reasonably stable. Those ultra-light, flimsy things they sell at big box stores are useful for little point and shoot cameras, but not really for DSLRs. I'd suggest a more stable alternative solution like a gorilla pod, a bean bag support, or a decent clamp before I'd suggest going the ultra-flimsy route.
I don't think that Bogen/Manfrotto makes anything that is truly junk. Slik makes some good and some horrible tripods, so be a little careful there.