It all depends on how much abuse you dish out.
IMHO: I don't like to buy pricey stuff, but have found through experience that the "Rule of $10" applies.
"Every time you ride a bike, over the course of 5 years, you'll spend $10 either in repairs and maintenance, or through the initial price, with only minor repairs popping up."
IE: I ride 3-4 times a week, between 5-10 miles, singletrack, technical stuff, etc. I take 2-3 weeks a year total off, sometimes without bringing the bike. So, the math easily is: 50 weeks multiplied by $30-40.00 . 50x$30=$1500.00. Thats about what my ride was worth before I decided to swap in my Talas fork and good wheelset, after destroying my previous fork, and obliterating my singlespeed wheelset.
So, I'd like to believe that over the course of the next 2-3 years, it'll be money well invested. Yeah, you could go cheaper, but I'm down to just 1 bike, and believe me, it does everything I want it to do and more.Like Sparty said, worry about yourself and run what you brung. If you're not sure, ask to borrow a buddy's "Blinglespeed" and see if the hype's right.