I've own/owned every single pair of Grados except the PS1000's. In general, they're great. But the only ones to disappoint are the iGrados (which were a joke), and the SR125. 
 
If you look at the freq. graph on headroom, there is a strong dip in the midrange near the 5KHz range, compared to, say, the SR80i or the SR225i. What the... Grado?
 
Midrange consequently ain't too great. I'm not saying these are horrible, just not the typical Grado sound you'd expect. And you can spend more (SR225i) or less (SR80i) money and get a better phone either way.
 
I'd personally recommend the extra $50 to upgrade to the SR225i's, which, imo, are the best sound quality to price ratio for any grado. 

These are just simply amazing. I'm surprised there hasn't been a review on head-fi about these. I've been through 8-10 computer speakers and these are the best for the money.
 
If you think the Harman Kardon Soundsticks III are good, the GLA-55 (get it? GLA55 looks like glass?) kicks their butt. 
 
I've never heard such good bass from 3 inch midrange drivers that have to cover mid and bass frequencies. It's a 2.0 system without a subwoofer, but there is a subwoofer out option on the right speaker if you REALLY want more bass. I don't think that's necessary for 95% of people though. The 2 tweeters provide stunningly accurate highs without being sibilant at all, which is difficult to do. Can blast LOUD, enough to throw a small rave in my dorm ;P
 
These look really slick too, like something from an art gallery. Relatively compact on my desk because there's no sub (not a 2.1, but again, has the option of being a 2.1). 
 
And they're limited edition of 3,000. So get one before they're all gone!
 
The only downside is the relative price. Oh well. It's still less than an HD800 or HD700 or GS1000i. So suck it up and try out some speakers instead of headphones for a change!