Furnace filter ?

Had a furnace installed in this thread http://hvac-talk.com/vbb/showthread....urnace-install and was wondering..



The way they made the new filter location I can easily use a 2" or better. Would it be a good idea or just stick with 1" filters?



Also been looking and I really can't find a good place to buy filters at a descent price,A lot are asking 3 bucks for a cheap fiberglass one. Any place you guys get yours at a good price that a homeowner can also?



Thanks in advance you all have been great so far..



Dale