I work from home and like to be comfortable without being baggier than I actually am! So I happened to buy a pair of Zakti leggings a few months ago for £25. Cheaper than lulumon by far and better made than Gap.
Zakti
They are brilliant. Well fitting - well made - I do yoga in them - they wash well and are holding their shape beautifully. No I don't work for them, but would really recommend a visit in the sales.
BTW - if you haven't already done this - if you fancy say a pair of Zakti leggings - just google 'vouchers' and 'zakti' or any other brand as there are often 10 - 30% discounts available if you nose around for a bit.
And my DH say they make my arse look fantastic. 