Fran' Here's a cheap stop gap cool2

http://www.ebay.co.uk/itm/ROLAND-BK9-ARR...4#ht_919wt_1159

Regarding the Korg keyboard's I've heard both board's side by side and I didn't think there was a great deal of difference soundwise between the two, you can change the sound's of both dramatically using the on board EQ system. Having said that my ear's ain't what they used to be. It strike's me that Korg have cut down on buttons, VH, Sampler, build quality, outlet's etc etc to achieve the price of the Pa600

If you check the manuals the sound's and styles are the same just a few missing in the Pa600. Hope this help's

All the best

Col

PS: If you got a real keyboard you may cancel your Roland darthvader