After testing both the A1 ans B1 revs of the DLink DIR-825, I've thrown in the towel. I chose the 825 based on the excellent range and stability of my DGL-4300 "G" unit with external antennae.
I first bought/tried the DIR-825 Rev A1 but it had continual connection breaks every few minutes - so much so, I could not manage further testing. I eventually was able to get a refund from the retailer.
I then found/bought a DIR-825 Rev B1. It had less frequent drops (every hour, not minute) BUT found many other problems:
1. Weak signal. 4/5 bars at 15 feet on either 2.4 or 5.
2. Very fast signal fall of. Dead by 50-75 feet, line of sight. Not connectable from room above, 20 feet away.
3. Signals didn't show in Vista network list (0 bars if SSID hidden) whereas other WAP's do show with SSID hidden as "unnamed network". Strange.
4. Radios shut down sporadically and don't show again until the WAP is rebooted or reset.
5. Lower throughput than competition like WRT-610.
6. After many reconfigs, it remained consistently inconsistent.
I then got a Linksys WRT610 with its castrated antenna, no antenna jacks, and bimbo sculpted design. Range was better, good across my 2 story home. Signal was always visible. No reboots needed after 1 week of continuous operation. Throughput was also slightly better at 15': 70 vs 64 mbps. At 100', no contest. The 825 was either dead or fluctuating. The 610 remained consistent.
So, I am reluctantly returning the DIR-825 and keeping the WRT-610 despite its bimbo looks, lack of external antenna jacks, and neutered antennae.
I truly hope D-Link eventually produces an "N" router that is at least as good as its older DGL-4300 "G" router which remains my gold standard and that it has "N" range performance that no one has delivered.
In general, I am greatly disappointed with the range of ALL "N" access points. None have the range that "diversity reception" is supposed to provide. So far, they all seem to be no better than my older "G" units. Oh, well.
Maybe the next geheration of products will be up to snuff. I just couldn't wait.