I highly recommend the MXDL SA-76 Turbohead. aka the Skyray A01
Its not too far off the HD2010 and can be easily modded to bypass the driver resistors to run harder.
I also asked about it here.
You can pick them up from either of these two ebay sellers. I got mine for £9/$14.50 and its an absolute steal at that price. Real glass lens, easy to hold. Runs at around 2.5+ amps.