Re: John Deere 425 needs 3 pt hitch
I recently bought the Ruegg Cat 0/1 hitch for my 445 and it is a very well made, robust piece. I recommend it. I will say though, the instructions that come with it leave little to be desired. So, you may have a bit of head scratching going on if your new to 3 pt hitches (like myself). If you find yourself stuck, post on here and others will help you out (or PM me, since I just installed one and it is still pretty fresh in my mind).
Weight.... I'm pondering that myself. I would say loading your rear tires should be your first step. There are many threads on here explaining the procedure. Second would be rear wheel weights. Having the loaded tires and wheel weights will be important, because if your going to be using a 3 pt attachment, you need that extra down force on your drive axle. I guess a couple of suitcase weights in the front will help with keeping the front on the ground for steering purposes.(or if you can leave a front attachment such as a plow on, so that can work as a counter balance to the rear attachment).
I would say nothing bigger then a 54" plow, maybe 60" tops (I personally would stay at 54" tops).
For the size of the rear implements... I would say to try and stick to four foot models. I truly believe anything bigger would be to much for the tractor. This especially holds true if the soil is very hard and if there is a lot of rocks or roots in the soil. Although the 425/445/455 model tractors are nice Garden Tractors, they are not full sized tractors and have their limitations. Anything bigger then 4', I think it would stop you in your tracks if you hit a good rock or root (even the 4' size might do that, so be prepared).
Best brand is all subjective and is based on mostly opinion and the size of the person's wallet. Type will be dependent on what your looking to do with you tractor. And, where to buy.. well that all depends on what you need and how much your willing to spend. If you let us know what types of attachments your looking for, then people can start chiming in where the best deals are.