A lot of people try lots of different things before they settle on something. I've tried the BPL pillows (single and dual chamber) and it didn't work for me. When fully inflated, I don't like the shape (although the dual chamber is better). When slightly deflated, I didn't like sloshing. Others love the things. I like the Montbell pillow more, but I'm still not thrilled with it. I've heard of several ideas, including:
1) Make your own out of foam. Drill holes in it (search to find links on how to do this) to save weight.
2) Sit pad plus some softer foam. A closed cell sit pad raises your head a bit (especially if you are completely under a sleeping pad). A little soft foam on top might not weigh much nor need to do much.
3) A nice cover over bubble pack. There are lots of different types of bubble pack, so you could experiment and find the right type.
4) Propore (e. g. DriDucks) style rain jacket/pants inside a nice cover. The idea here is that you never wear your rain jacket to bed, so you aren't carrying extra weight. The DriDucks sold at BPL seem to be made out of a material that is a bit bulkier than the other propore I've bought. Normally, this is a disadvantage, but for this purpose, I think it would work really well. Granite Gear makes a nice looking pillow sack with fleece on one side. You might just as easily use a stuff sack, with a fleece section covering it and save a few grams (assuming you bring the stuff sack anyway). I think the Granite Gear stuff sack is water proof, which would be a bonus if you put a slightly damp rain jacket in it. The cloth might serve dual purpose (bandanna maybe?).
Using clothing with a BPL pillow is not a bad strategy. If it is not that cold, use the clothing. If it gets so cold you want to wear everything, use the pillow. On a week long trip, you might end up doing both.