My glow plugs are starting to get weak in my truck and I've been looking at a lot of different brands of glow plugs and was wondering if y'all had any suggestions on which ones I should go with?

 

Most people on the site from what I've read like the AC 60gs or the Bosch Duraterm(which I have). The duraterms are great and the only time its been to cold for me to start after replacing them was when it was -10f in the early morning with a low of -18f that same night, but it was more/less the batteries not putting enough juice out. I would recommend the duraterms since that's what I have experience with them. They are also really cheap as well. I paid a little less than 55 bucks to have them shipped to my house and all of them worked. But both these glow plugs listed above are "heavier" than the stock so you might want to get a glow plug override to keep them on longer when it is cold out, not to hard if you just use the factory relay and setup.
Here's a link to them from where I got them, I doubt you can really beat the price, but who knows.
Amazon.com: Buying Choices: Bosch 80034 Duraterm Glow Plug
You want to buy them from that "your keyless remote" place, exactly what I did and the total was 52.xx I think and just great glow plugs.