HEL usually run an offer in December for about 30 or 40% off. Keep an eye on their website (HEL Performance). I got some last year and fitted the fronts this summer. Fairly straightforward to do. Unsure if they improved the braking to be honest, although the brake lines were coming up 7 years old so overdue a change by Suzuki's schedule.
I haven't fitted the rear lines yet as a bolt on my hugger was giving me grief at the time and I haven't got round to revisiting. That said, it looks a bit of a pain to change the lines due to access issues.