I use a pair of Harmonic Technology Truthlinks between my Planet (pre 2000) and linestage. Very pleasing sonics. Less glare from bad recordings.
I think the best interconnects made are from The Chord Company. They are sold for Naim gear, by Naim dealers, but beat anything I've heard, regardless of price. The best dollar-for-dollar speaker cables are the Naim cables. They are very reasonably priced, and should work really well with Rega gear - I use them both with a Brio & a Planar 3 and a set of Harbeths in a small system I have & they are wonderful. Try a set and save some money. If you don't have a dealer near you, try Gene Rubin Audio on-line.