Richard,
Good choice, the only reason that the dealers are discounting the Senator series 5 range is that the new series 6 comes out in July, and these dealers need to move their stock in order not to be left with any speculatively ordered stock when the new model comes out.
We've got a series 5 Indiana, picked it up last November, it's in the dealers now having a few cosmetic items dealt with under the warranty, but by & large we're over the moon with it.