I love DR high beams .45-.125 on my Q5. The flexible feel of the strings really complements the 35" scale, and the growly tone brings out the personality of the bass. On its own, flat EQ, the sound is "a little much", but pulling out some high mids at the amp transforms the tone into a deep, modern, complex tone that works well on all kinds of different tunes. Its got a great snap when you dig in fingerstyle.
I've recently been trying some Sodowsky Nickel extra-longs, and they have a great feel on there too. More mellow and balanced without EQ, stiffer feel. Unfortunately I havn't had any gig experience with them yet since the back bow in my neck has been getting worse
