Well... I picked up my HL61A750 yesterday... and I LOVE it. It's TONS better than my old Mits WD-52525 that was junked out through the Best Buy performance plan... so I basically got the new set for free (minus another $400 for a new performance plan).
This is of course my opionion... but I played with both last years LED and this years LED and I could make either one look great... or bad vs the other one.
Also... although I'm sure this TV isn't as bright as a NEW bulb... I think it's plenty bright enough when you're not pitting it against other sets on display... once it's in your home you'll be happy. In fact, I'd say that most will NOT like it on the birghtest settings once you have it in the house... so I'm not sure where all these "brightness" arguments are coming from. My understanding is that the LED is rated at 60,000 hours before it's at half brightness... if you're lucky you'd get what like 1,000-2,000 hours on each bulb before half brightness? At any rate I'm already running the LED on at about half bright just because it is so bright so when things get alittle dim, I'll boost it up again so I would say I'll probably get over 90,000 hours of this set (assuming no major issues come in in that time).
I put the grid up and I lucked out with only some very slight bowing... I'd say less then 1/16th of an inch from top to bottom or side to side... my biggest "problem" is my lower right corner... I think though that the problem is that the screen just isn't seated right so once I get annoyed enough I'll open up the case and press it in some more. I also have very little "convergence" issues... basically you only notice if you're 1ft away fromt the set AND have a grid up, lol... but I don't watch grids.
I've updated to the latest firmware and so far have played around 10hrs of 360 via HDMI at 1080p... I've also watched a few movies at 1080p/24 with no issues... and I've watched a few DVDs/HD-DVDs at 1080p/60 with no issues. ((I have an HD-A35 HD-DVD player)). I've also played a little bit of Wii at 480p with no issues... all these go through my Onkyo 605 AVR btw.
I'm still not sure how I like my settings yet... I'll probably run through DVE on HD-DVD tomorrow and get things a little better.
A few quick questions though... how do I enable the advanced settings in the service menu? Also... I (by mistake) disabled something in the service menu... I think it's like the 5th item down (I'm at work and can't remember)... something like Noise Reduction or color monitor??? (the option below it said "wide", haha)... at any rate, I can't turn it back on lol... anyone know how.... or even what I'm talking about, lol. I tried factory restore but that didn't do it either.
Overall.... would I buy the TV again? yes... would I buy a second one... yes... would I pick another TV over this one... probably not, as I didn't. Do I wish it was laser... sure... or maybe OLED... sure... but this set will hold me over until the next "great" thing shows up.