for the past tens years i have used 10-13.4's, they are excellent.
Last week my new pair of 10-13x's arrived ( off ebay, $750AUD from Florida ), have used them twice so far, absolutley awesome.
I also have a MSA Gallet helmet with ANR which i use more frequently than headset, i will never fly without ANR again.
Perhaps if you are starting out, buy an economical ( cheaper, perhaps secondhand ) make sure you get gel seals and the cloth covers, but as soon as you can upgrade.
On that note i now have a pair of well loved DC 10-13.4's you can have for $250 plus freight, presently in Perth.
if you plan to use the headset alot, stear clear of the cheaper brands.