Audio Interface - buying

[phacemeltar]

i am currently shopping for an external sound card (audio interface) for my PC. after about 2 minutes of looking on amazon, i found http://www.amazon.com/M-Audio-M-Trac...udio+interface which looks like it will do what i want, though in the comments one of the posters said that it doesnt get enough power.

i was wondering if anyone could advise me on a good brandname to look into for a quality piece of equipment. i primarily will be using it for music production, but also to hook my guitar up to my pc. im not very experienced with these types of products, so any help will be much appreciated.