On my previous trailer (1994 Jayco J-series 3250FK) I installed the Husky Brute 4500 (bought from Amazon for around $210). It's an awesome jack and very well made....lots of nice features (like 1 front light illuminating the ball area and 2 rear lights illuminating the WDH bar hookup area -- also has a built-in plug holder with rain cover to hold your 7-pin plug). One note on the plug holder - it does stick out the back of the jack about 2-3 inches, so it may interfere with your LP Tank cover (if you have one) depending on how close your tanks are to the jack....I had to remove my plastic tank cover to install the Husky (does not interfere with the regulator, just the tank cover). The jack has lots of power and very smooth operation (I believe it has ball-bearings on the inside) and automatically "slows down" the motor as you approach the upper/lower stop limits. Great Jack overall (I took it off the old trailer when we traded it in and gave it to a friend who loves it also).
Unfortunately, my new trailer (2013 Eagle 314BDS) came with an "Atwood 3500" electronic jack which is not quite up to par with the quality of the Husky. The Atwood struggles a little to lift my new trailer (1200# TW) and doesn't have the same "slow down" feature -- it just runs full speed until you hit the upper limits. The Atwood also does not have any lights or the plug holder (I miss that). When the Atwood fails, I will definitely replace it with a Husky 4500.
2005 Ford Excursion (4x4 Limited, 6.8L V-10 Gas, 3.73 Axle Ratio, E-rated Tires)
2013 Jayco Eagle 314 BDS (Outside Kitchen, Hide-A-Bed, 15k A/C, 50A Service)
Husky Centerline WDH (1400#)
DW, DD x 2 (10 y/o twins), DS x 2 (8 & 6 y/o), and "Oscar" the Weiner Dog